Finding the Fourth Proportional to 172,978.12, 238,709.70 and 93,490.12

Step by Step Solution

1. Step 1: Write the proportion equation
   172,978.12 : 238,709.70 = 93,490.12 : x
2. Step 2: Convert to fraction form
   172,978.12/238,709.70 = 93,490.12/x
3. Step 3: Cross multiply
   172,978.12x = 238,709.70 × 93,490.12
4. Step 4: Simplify right side
   172,978.12x = 22,316,998,498.16
5. Step 5: Solve for x
   x = 22,316,998,498.16/172,978.12
6. Step 6: Final answer
   x = 129,016.31