Finding the Fourth Proportional to 103,530.83, 142,870.10 and 67,720.05

Step by Step Solution

1. Step 1: Write the proportion equation
   103,530.83 : 142,870.10 = 67,720.05 : x
2. Step 2: Convert to fraction form
   103,530.83/142,870.10 = 67,720.05/x
3. Step 3: Cross multiply
   103,530.83x = 142,870.10 × 67,720.05
4. Step 4: Simplify right side
   103,530.83x = 9,675,169,976.90
5. Step 5: Solve for x
   x = 9,675,169,976.90/103,530.83
6. Step 6: Final answer
   x = 93,452.07