Finding the Fourth Proportional to 65,062.48, 89,792.52 and 39,928.40

Step by Step Solution

1. Step 1: Write the proportion equation
   65,062.48 : 89,792.52 = 39,928.40 : x
2. Step 2: Convert to fraction form
   65,062.48/89,792.52 = 39,928.40/x
3. Step 3: Cross multiply
   65,062.48x = 89,792.52 × 39,928.40
4. Step 4: Simplify right side
   65,062.48x = 3,585,271,655.57
5. Step 5: Solve for x
   x = 3,585,271,655.57/65,062.48
6. Step 6: Final answer
   x = 55,105.06