Finding the Fourth Proportional to 123,898.17, 170,980.16 and 76,182.69

Step by Step Solution

1. Step 1: Write the proportion equation
   123,898.17 : 170,980.16 = 76,182.69 : x
2. Step 2: Convert to fraction form
   123,898.17/170,980.16 = 76,182.69/x
3. Step 3: Cross multiply
   123,898.17x = 170,980.16 × 76,182.69
4. Step 4: Simplify right side
   123,898.17x = 13,025,728,525.43
5. Step 5: Solve for x
   x = 13,025,728,525.43/123,898.17
6. Step 6: Final answer
   x = 105,132.53