Finding the Fourth Proportional to 123,894.18, 171,001.18 and 81,456.66

Step by Step Solution

1. Step 1: Write the proportion equation
   123,894.18 : 171,001.18 = 81,456.66 : x
2. Step 2: Convert to fraction form
   123,894.18/171,001.18 = 81,456.66/x
3. Step 3: Cross multiply
   123,894.18x = 171,001.18 × 81,456.66
4. Step 4: Simplify right side
   123,894.18x = 13,929,184,978.86
5. Step 5: Solve for x
   x = 13,929,184,978.86/123,894.18
6. Step 6: Final answer
   x = 112,428.08