Finding the Fourth Proportional to 103,068.96, 142,521.48 and 81,811.32

Step by Step Solution

1. Step 1: Write the proportion equation
   103,068.96 : 142,521.48 = 81,811.32 : x
2. Step 2: Convert to fraction form
   103,068.96/142,521.48 = 81,811.32/x
3. Step 3: Cross multiply
   103,068.96x = 142,521.48 × 81,811.32
4. Step 4: Simplify right side
   103,068.96x = 11,659,870,407.15
5. Step 5: Solve for x
   x = 11,659,870,407.15/103,068.96
6. Step 6: Final answer
   x = 113,126.89