Finding the Fourth Proportional to 128,114.54, 192,288.98 and 64,978.24

Step by Step Solution

1. Step 1: Write the proportion equation
   128,114.54 : 192,288.98 = 64,978.24 : x
2. Step 2: Convert to fraction form
   128,114.54/192,288.98 = 64,978.24/x
3. Step 3: Cross multiply
   128,114.54x = 192,288.98 × 64,978.24
4. Step 4: Simplify right side
   128,114.54x = 12,494,598,806.78
5. Step 5: Solve for x
   x = 12,494,598,806.78/128,114.54
6. Step 6: Final answer
   x = 97,526.79