Finding the Fourth Proportional to 42,128.42, 63,171.46 and 14,038.63

Step by Step Solution

1. Step 1: Write the proportion equation
   42,128.42 : 63,171.46 = 14,038.63 : x
2. Step 2: Convert to fraction form
   42,128.42/63,171.46 = 14,038.63/x
3. Step 3: Cross multiply
   42,128.42x = 63,171.46 × 14,038.63
4. Step 4: Simplify right side
   42,128.42x = 886,840,560.47
5. Step 5: Solve for x
   x = 886,840,560.47/42,128.42
6. Step 6: Final answer
   x = 21,050.89