Finding the Fourth Proportional to 1,172,443,665.16, 1,618,000,368.48 and 636,617,914.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,172,443,665.16 : 1,618,000,368.48 = 636,617,914.21 : x
2. Step 2: Convert to fraction form
   1,172,443,665.16/1,618,000,368.48 = 636,617,914.21/x
3. Step 3: Cross multiply
   1,172,443,665.16x = 1,618,000,368.48 × 636,617,914.21
4. Step 4: Simplify right side
   1,172,443,665.16x = 1,030,048,019,772,749,056
5. Step 5: Solve for x
   x = 1,030,048,019,772,749,056/1,172,443,665.16
6. Step 6: Final answer
   x = 878,547,985.19