Finding the Fourth Proportional to 65,939.99, 90,997.20 and 35,725.50

Step by Step Solution

1. Step 1: Write the proportion equation
   65,939.99 : 90,997.20 = 35,725.50 : x
2. Step 2: Convert to fraction form
   65,939.99/90,997.20 = 35,725.50/x
3. Step 3: Cross multiply
   65,939.99x = 90,997.20 × 35,725.50
4. Step 4: Simplify right side
   65,939.99x = 3,250,920,468.60
5. Step 5: Solve for x
   x = 3,250,920,468.60/65,939.99
6. Step 6: Final answer
   x = 49,301.20