Finding the Fourth Proportional to 172,910.58, 259,388.55 and 67,715.88

Step by Step Solution

1. Step 1: Write the proportion equation
   172,910.58 : 259,388.55 = 67,715.88 : x
2. Step 2: Convert to fraction form
   172,910.58/259,388.55 = 67,715.88/x
3. Step 3: Cross multiply
   172,910.58x = 259,388.55 × 67,715.88
4. Step 4: Simplify right side
   172,910.58x = 17,564,723,925.17
5. Step 5: Solve for x
   x = 17,564,723,925.17/172,910.58
6. Step 6: Final answer
   x = 101,582.70