Finding the Fourth Proportional to 91,094.52, 125,615.05 and 78,390.78

Step by Step Solution

1. Step 1: Write the proportion equation
   91,094.52 : 125,615.05 = 78,390.78 : x
2. Step 2: Convert to fraction form
   91,094.52/125,615.05 = 78,390.78/x
3. Step 3: Cross multiply
   91,094.52x = 125,615.05 × 78,390.78
4. Step 4: Simplify right side
   91,094.52x = 9,847,061,357.29
5. Step 5: Solve for x
   x = 9,847,061,357.29/91,094.52
6. Step 6: Final answer
   x = 108,097.19