Finding the Fourth Proportional to 103,081.71, 142,191.68 and 65,290.35

Step by Step Solution

1. Step 1: Write the proportion equation
   103,081.71 : 142,191.68 = 65,290.35 : x
2. Step 2: Convert to fraction form
   103,081.71/142,191.68 = 65,290.35/x
3. Step 3: Cross multiply
   103,081.71x = 142,191.68 × 65,290.35
4. Step 4: Simplify right side
   103,081.71x = 9,283,744,227.84
5. Step 5: Solve for x
   x = 9,283,744,227.84/103,081.71
6. Step 6: Final answer
   x = 90,061.99