Finding the Fourth Proportional to 65,683.50, 90,643.59 and 35,875.50

Step by Step Solution

1. Step 1: Write the proportion equation
   65,683.50 : 90,643.59 = 35,875.50 : x
2. Step 2: Convert to fraction form
   65,683.50/90,643.59 = 35,875.50/x
3. Step 3: Cross multiply
   65,683.50x = 90,643.59 × 35,875.50
4. Step 4: Simplify right side
   65,683.50x = 3,251,884,113.05
5. Step 5: Solve for x
   x = 3,251,884,113.05/65,683.50
6. Step 6: Final answer
   x = 49,508.39