Finding the Fourth Proportional to 124,956.29, 172,369.59 and 76,581.66

Step by Step Solution

1. Step 1: Write the proportion equation
   124,956.29 : 172,369.59 = 76,581.66 : x
2. Step 2: Convert to fraction form
   124,956.29/172,369.59 = 76,581.66/x
3. Step 3: Cross multiply
   124,956.29x = 172,369.59 × 76,581.66
4. Step 4: Simplify right side
   124,956.29x = 13,200,349,335.72
5. Step 5: Solve for x
   x = 13,200,349,335.72/124,956.29
6. Step 6: Final answer
   x = 105,639.73