Finding the Fourth Proportional to 91,200.72, 136,593.30 and 74,535.84

Step by Step Solution

1. Step 1: Write the proportion equation
   91,200.72 : 136,593.30 = 74,535.84 : x
2. Step 2: Convert to fraction form
   91,200.72/136,593.30 = 74,535.84/x
3. Step 3: Cross multiply
   91,200.72x = 136,593.30 × 74,535.84
4. Step 4: Simplify right side
   91,200.72x = 10,181,096,353.87
5. Step 5: Solve for x
   x = 10,181,096,353.87/91,200.72
6. Step 6: Final answer
   x = 111,633.95