Finding the Fourth Proportional to 65,039.30, 89,764.56 and 39,553.76

Step by Step Solution

1. Step 1: Write the proportion equation
   65,039.30 : 89,764.56 = 39,553.76 : x
2. Step 2: Convert to fraction form
   65,039.30/89,764.56 = 39,553.76/x
3. Step 3: Cross multiply
   65,039.30x = 89,764.56 × 39,553.76
4. Step 4: Simplify right side
   65,039.30x = 3,550,525,862.75
5. Step 5: Solve for x
   x = 3,550,525,862.75/65,039.30
6. Step 6: Final answer
   x = 54,590.47