Finding the Fourth Proportional to 65,457.50, 90,331.35 and 35,649.50

Step by Step Solution

1. Step 1: Write the proportion equation
   65,457.50 : 90,331.35 = 35,649.50 : x
2. Step 2: Convert to fraction form
   65,457.50/90,331.35 = 35,649.50/x
3. Step 3: Cross multiply
   65,457.50x = 90,331.35 × 35,649.50
4. Step 4: Simplify right side
   65,457.50x = 3,220,267,461.83
5. Step 5: Solve for x
   x = 3,220,267,461.83/65,457.50
6. Step 6: Final answer
   x = 49,196.31