Finding the Fourth Proportional to 2,166,926,081.55, 2,990,542,420.31 and 1,227,295,878.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,166,926,081.55 : 2,990,542,420.31 = 1,227,295,878.27 : x
2. Step 2: Convert to fraction form
   2,166,926,081.55/2,990,542,420.31 = 1,227,295,878.27/x
3. Step 3: Cross multiply
   2,166,926,081.55x = 2,990,542,420.31 × 1,227,295,878.27
4. Step 4: Simplify right side
   2,166,926,081.55x = 3,670,280,386,231,916,032
5. Step 5: Solve for x
   x = 3,670,280,386,231,916,032/2,166,926,081.55
6. Step 6: Final answer
   x = 1,693,772,767.55