Finding the Fourth Proportional to 64,947.55, 89,283.58 and 55,839.37

Step by Step Solution

1. Step 1: Write the proportion equation
   64,947.55 : 89,283.58 = 55,839.37 : x
2. Step 2: Convert to fraction form
   64,947.55/89,283.58 = 55,839.37/x
3. Step 3: Cross multiply
   64,947.55x = 89,283.58 × 55,839.37
4. Step 4: Simplify right side
   64,947.55x = 4,985,539,291.15
5. Step 5: Solve for x
   x = 4,985,539,291.15/64,947.55
6. Step 6: Final answer
   x = 76,762.54