Finding the Fourth Proportional to 124,815.72, 172,225.76 and 71,101.78

Step by Step Solution

1. Step 1: Write the proportion equation
   124,815.72 : 172,225.76 = 71,101.78 : x
2. Step 2: Convert to fraction form
   124,815.72/172,225.76 = 71,101.78/x
3. Step 3: Cross multiply
   124,815.72x = 172,225.76 × 71,101.78
4. Step 4: Simplify right side
   124,815.72x = 12,245,558,097.85
5. Step 5: Solve for x
   x = 12,245,558,097.85/124,815.72
6. Step 6: Final answer
   x = 98,109.10