Finding the Fourth Proportional to 123,124.93, 169,976.61 and 87,400.28

Step by Step Solution

1. Step 1: Write the proportion equation
   123,124.93 : 169,976.61 = 87,400.28 : x
2. Step 2: Convert to fraction form
   123,124.93/169,976.61 = 87,400.28/x
3. Step 3: Cross multiply
   123,124.93x = 169,976.61 × 87,400.28
4. Step 4: Simplify right side
   123,124.93x = 14,856,003,732.39
5. Step 5: Solve for x
   x = 14,856,003,732.39/123,124.93
6. Step 6: Final answer
   x = 120,657.97