Finding the Fourth Proportional to 88,290.34, 121,759.95 and 65,685.94

Step by Step Solution

1. Step 1: Write the proportion equation
   88,290.34 : 121,759.95 = 65,685.94 : x
2. Step 2: Convert to fraction form
   88,290.34/121,759.95 = 65,685.94/x
3. Step 3: Cross multiply
   88,290.34x = 121,759.95 × 65,685.94
4. Step 4: Simplify right side
   88,290.34x = 7,997,916,770.10
5. Step 5: Solve for x
   x = 7,997,916,770.10/88,290.34
6. Step 6: Final answer
   x = 90,586.54