Finding the Fourth Proportional to 65,020.50, 89,728.29 and 35,212.50

Step by Step Solution

1. Step 1: Write the proportion equation
   65,020.50 : 89,728.29 = 35,212.50 : x
2. Step 2: Convert to fraction form
   65,020.50/89,728.29 = 35,212.50/x
3. Step 3: Cross multiply
   65,020.50x = 89,728.29 × 35,212.50
4. Step 4: Simplify right side
   65,020.50x = 3,159,557,411.63
5. Step 5: Solve for x
   x = 3,159,557,411.63/65,020.50
6. Step 6: Final answer
   x = 48,593.25