Finding the Fourth Proportional to 103,589.80, 142,878.18 and 67,722.28

Step by Step Solution

1. Step 1: Write the proportion equation
   103,589.80 : 142,878.18 = 67,722.28 : x
2. Step 2: Convert to fraction form
   103,589.80/142,878.18 = 67,722.28/x
3. Step 3: Cross multiply
   103,589.80x = 142,878.18 × 67,722.28
4. Step 4: Simplify right side
   103,589.80x = 9,676,036,111.85
5. Step 5: Solve for x
   x = 9,676,036,111.85/103,589.80
6. Step 6: Final answer
   x = 93,407.23