Finding the Fourth Proportional to 65,680.88, 90,641.77 and 35,872.88

Step by Step Solution

1. Step 1: Write the proportion equation
   65,680.88 : 90,641.77 = 35,872.88 : x
2. Step 2: Convert to fraction form
   65,680.88/90,641.77 = 35,872.88/x
3. Step 3: Cross multiply
   65,680.88x = 90,641.77 × 35,872.88
4. Step 4: Simplify right side
   65,680.88x = 3,251,580,795.31
5. Step 5: Solve for x
   x = 3,251,580,795.31/65,680.88
6. Step 6: Final answer
   x = 49,505.75