Finding the Fourth Proportional to 72,152.56, 99,598.37 and 64,585.54

Step by Step Solution

1. Step 1: Write the proportion equation
   72,152.56 : 99,598.37 = 64,585.54 : x
2. Step 2: Convert to fraction form
   72,152.56/99,598.37 = 64,585.54/x
3. Step 3: Cross multiply
   72,152.56x = 99,598.37 × 64,585.54
4. Step 4: Simplify right side
   72,152.56x = 6,432,614,509.57
5. Step 5: Solve for x
   x = 6,432,614,509.57/72,152.56
6. Step 6: Final answer
   x = 89,152.96