Finding the Fourth Proportional to 91,506,146.67, 126,231,789.39 and 58,431,620.79

Step by Step Solution

1. Step 1: Write the proportion equation
   91,506,146.67 : 126,231,789.39 = 58,431,620.79 : x
2. Step 2: Convert to fraction form
   91,506,146.67/126,231,789.39 = 58,431,620.79/x
3. Step 3: Cross multiply
   91,506,146.67x = 126,231,789.39 × 58,431,620.79
4. Step 4: Simplify right side
   91,506,146.67x = 7,375,928,049,279,625
5. Step 5: Solve for x
   x = 7,375,928,049,279,625/91,506,146.67
6. Step 6: Final answer
   x = 80,605,820.68