Finding the Fourth Proportional to 124,986.72, 172,455 and 74,015.46

Step by Step Solution

1. Step 1: Write the proportion equation
   124,986.72 : 172,455 = 74,015.46 : x
2. Step 2: Convert to fraction form
   124,986.72/172,455 = 74,015.46/x
3. Step 3: Cross multiply
   124,986.72x = 172,455 × 74,015.46
4. Step 4: Simplify right side
   124,986.72x = 12,764,336,154.30
5. Step 5: Solve for x
   x = 12,764,336,154.30/124,986.72
6. Step 6: Final answer
   x = 102,125.54