Finding the Fourth Proportional to 124,088.72, 171,150.78 and 78,727.64

Step by Step Solution

1. Step 1: Write the proportion equation
   124,088.72 : 171,150.78 = 78,727.64 : x
2. Step 2: Convert to fraction form
   124,088.72/171,150.78 = 78,727.64/x
3. Step 3: Cross multiply
   124,088.72x = 171,150.78 × 78,727.64
4. Step 4: Simplify right side
   124,088.72x = 13,474,296,993.56
5. Step 5: Solve for x
   x = 13,474,296,993.56/124,088.72
6. Step 6: Final answer
   x = 108,585.99