Finding the Fourth Proportional to 172,253.76, 258,498.72 and 67,073.28

Step by Step Solution

1. Step 1: Write the proportion equation
   172,253.76 : 258,498.72 = 67,073.28 : x
2. Step 2: Convert to fraction form
   172,253.76/258,498.72 = 67,073.28/x
3. Step 3: Cross multiply
   172,253.76x = 258,498.72 × 67,073.28
4. Step 4: Simplify right side
   172,253.76x = 17,338,357,026.20
5. Step 5: Solve for x
   x = 17,338,357,026.20/172,253.76
6. Step 6: Final answer
   x = 100,655.90