Finding the Fourth Proportional to 123,842.91, 170,974.05 and 81,524.46

Step by Step Solution

1. Step 1: Write the proportion equation
   123,842.91 : 170,974.05 = 81,524.46 : x
2. Step 2: Convert to fraction form
   123,842.91/170,974.05 = 81,524.46/x
3. Step 3: Cross multiply
   123,842.91x = 170,974.05 × 81,524.46
4. Step 4: Simplify right side
   123,842.91x = 13,938,567,100.26
5. Step 5: Solve for x
   x = 13,938,567,100.26/123,842.91
6. Step 6: Final answer
   x = 112,550.38