Finding the Fourth Proportional to 128,042.72, 192,002.72 and 60,518.56

Step by Step Solution

1. Step 1: Write the proportion equation
   128,042.72 : 192,002.72 = 60,518.56 : x
2. Step 2: Convert to fraction form
   128,042.72/192,002.72 = 60,518.56/x
3. Step 3: Cross multiply
   128,042.72x = 192,002.72 × 60,518.56
4. Step 4: Simplify right side
   128,042.72x = 11,619,728,130.48
5. Step 5: Solve for x
   x = 11,619,728,130.48/128,042.72
6. Step 6: Final answer
   x = 90,748.84