Finding the Fourth Proportional to 91,044,105.90, 136,566,158.85 and 80,521,574.10

Step by Step Solution

1. Step 1: Write the proportion equation
   91,044,105.90 : 136,566,158.85 = 80,521,574.10 : x
2. Step 2: Convert to fraction form
   91,044,105.90/136,566,158.85 = 80,521,574.10/x
3. Step 3: Cross multiply
   91,044,105.90x = 136,566,158.85 × 80,521,574.10
4. Step 4: Simplify right side
   91,044,105.90x = 10,996,522,079,392,644
5. Step 5: Solve for x
   x = 10,996,522,079,392,644/91,044,105.90
6. Step 6: Final answer
   x = 120,782,361.15