Finding the Fourth Proportional to 91,906,945.20, 137,718,700.20 and 79,719,231.60

Step by Step Solution

1. Step 1: Write the proportion equation
   91,906,945.20 : 137,718,700.20 = 79,719,231.60 : x
2. Step 2: Convert to fraction form
   91,906,945.20/137,718,700.20 = 79,719,231.60/x
3. Step 3: Cross multiply
   91,906,945.20x = 137,718,700.20 × 79,719,231.60
4. Step 4: Simplify right side
   91,906,945.20x = 10,978,828,956,894,764
5. Step 5: Solve for x
   x = 10,978,828,956,894,764/91,906,945.20
6. Step 6: Final answer
   x = 119,455,922.87