Finding the Fourth Proportional to 65,686.43, 90,649.79 and 37,017.50

Step by Step Solution

1. Step 1: Write the proportion equation
   65,686.43 : 90,649.79 = 37,017.50 : x
2. Step 2: Convert to fraction form
   65,686.43/90,649.79 = 37,017.50/x
3. Step 3: Cross multiply
   65,686.43x = 90,649.79 × 37,017.50
4. Step 4: Simplify right side
   65,686.43x = 3,355,627,962.99
5. Step 5: Solve for x
   x = 3,355,627,962.99/65,686.43
6. Step 6: Final answer
   x = 51,085.56