Finding the Fourth Proportional to 40,542.72, 60,822.72 and 12,840.96

Step by Step Solution

1. Step 1: Write the proportion equation
   40,542.72 : 60,822.72 = 12,840.96 : x
2. Step 2: Convert to fraction form
   40,542.72/60,822.72 = 12,840.96/x
3. Step 3: Cross multiply
   40,542.72x = 60,822.72 × 12,840.96
4. Step 4: Simplify right side
   40,542.72x = 781,022,114.61
5. Step 5: Solve for x
   x = 781,022,114.61/40,542.72
6. Step 6: Final answer
   x = 19,264.18