Finding the Fourth Proportional to 91,375.95, 136,731.78 and 75,432.72

Step by Step Solution

1. Step 1: Write the proportion equation
   91,375.95 : 136,731.78 = 75,432.72 : x
2. Step 2: Convert to fraction form
   91,375.95/136,731.78 = 75,432.72/x
3. Step 3: Cross multiply
   91,375.95x = 136,731.78 × 75,432.72
4. Step 4: Simplify right side
   91,375.95x = 10,314,050,588.59
5. Step 5: Solve for x
   x = 10,314,050,588.59/91,375.95
6. Step 6: Final answer
   x = 112,874.89