Finding the Fourth Proportional to 65,056.84, 89,784.66 and 39,561.28

Step by Step Solution

1. Step 1: Write the proportion equation
   65,056.84 : 89,784.66 = 39,561.28 : x
2. Step 2: Convert to fraction form
   65,056.84/89,784.66 = 39,561.28/x
3. Step 3: Cross multiply
   65,056.84x = 89,784.66 × 39,561.28
4. Step 4: Simplify right side
   65,056.84x = 3,551,996,073.96
5. Step 5: Solve for x
   x = 3,551,996,073.96/65,056.84
6. Step 6: Final answer
   x = 54,598.35