Finding the Fourth Proportional to 91,251.42, 125,012.33 and 87,840.05

Step by Step Solution

1. Step 1: Write the proportion equation
   91,251.42 : 125,012.33 = 87,840.05 : x
2. Step 2: Convert to fraction form
   91,251.42/125,012.33 = 87,840.05/x
3. Step 3: Cross multiply
   91,251.42x = 125,012.33 × 87,840.05
4. Step 4: Simplify right side
   91,251.42x = 10,981,088,253.55
5. Step 5: Solve for x
   x = 10,981,088,253.55/91,251.42
6. Step 6: Final answer
   x = 120,338.82