Finding the Fourth Proportional to 42,431.04, 63,650.52 and 16,128.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,431.04 : 63,650.52 = 16,128.72 : x
2. Step 2: Convert to fraction form
   42,431.04/63,650.52 = 16,128.72/x
3. Step 3: Cross multiply
   42,431.04x = 63,650.52 × 16,128.72
4. Step 4: Simplify right side
   42,431.04x = 1,026,601,414.93
5. Step 5: Solve for x
   x = 1,026,601,414.93/42,431.04
6. Step 6: Final answer
   x = 24,194.59