Finding the Fourth Proportional to 2,116,142.55, 2,920,741.74 and 1,391,057.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116,142.55 : 2,920,741.74 = 1,391,057.28 : x
2. Step 2: Convert to fraction form
   2,116,142.55/2,920,741.74 = 1,391,057.28/x
3. Step 3: Cross multiply
   2,116,142.55x = 2,920,741.74 × 1,391,057.28
4. Step 4: Simplify right side
   2,116,142.55x = 4,062,919,060,426.87
5. Step 5: Solve for x
   x = 4,062,919,060,426.87/2,116,142.55
6. Step 6: Final answer
   x = 1,919,964.73