Finding the Fourth Proportional to 128,060.61, 192,049.38 and 42,648.72

Step by Step Solution

1. Step 1: Write the proportion equation
   128,060.61 : 192,049.38 = 42,648.72 : x
2. Step 2: Convert to fraction form
   128,060.61/192,049.38 = 42,648.72/x
3. Step 3: Cross multiply
   128,060.61x = 192,049.38 × 42,648.72
4. Step 4: Simplify right side
   128,060.61x = 8,190,660,233.79
5. Step 5: Solve for x
   x = 8,190,660,233.79/128,060.61
6. Step 6: Final answer
   x = 63,959.25