Finding the Fourth Proportional to 91,279,917.28, 136,964,162.76 and 40,155,293.20

Step by Step Solution

1. Step 1: Write the proportion equation
   91,279,917.28 : 136,964,162.76 = 40,155,293.20 : x
2. Step 2: Convert to fraction form
   91,279,917.28/136,964,162.76 = 40,155,293.20/x
3. Step 3: Cross multiply
   91,279,917.28x = 136,964,162.76 × 40,155,293.20
4. Step 4: Simplify right side
   91,279,917.28x = 5,499,836,113,520,321
5. Step 5: Solve for x
   x = 5,499,836,113,520,321/91,279,917.28
6. Step 6: Final answer
   x = 60,252,422.19