Finding the Fourth Proportional to 123,472.50, 170,430.93 and 78,760.50

Step by Step Solution

1. Step 1: Write the proportion equation
   123,472.50 : 170,430.93 = 78,760.50 : x
2. Step 2: Convert to fraction form
   123,472.50/170,430.93 = 78,760.50/x
3. Step 3: Cross multiply
   123,472.50x = 170,430.93 × 78,760.50
4. Step 4: Simplify right side
   123,472.50x = 13,423,225,262.27
5. Step 5: Solve for x
   x = 13,423,225,262.27/123,472.50
6. Step 6: Final answer
   x = 108,714.29