Finding the Fourth Proportional to 91,575.92, 126,250.69 and 78,289.89

Step by Step Solution

1. Step 1: Write the proportion equation
   91,575.92 : 126,250.69 = 78,289.89 : x
2. Step 2: Convert to fraction form
   91,575.92/126,250.69 = 78,289.89/x
3. Step 3: Cross multiply
   91,575.92x = 126,250.69 × 78,289.89
4. Step 4: Simplify right side
   91,575.92x = 9,884,152,632.52
5. Step 5: Solve for x
   x = 9,884,152,632.52/91,575.92
6. Step 6: Final answer
   x = 107,933.97