Finding the Fourth Proportional to 42,644.88, 63,972.72 and 14,570.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,644.88 : 63,972.72 = 14,570.28 : x
2. Step 2: Convert to fraction form
   42,644.88/63,972.72 = 14,570.28/x
3. Step 3: Cross multiply
   42,644.88x = 63,972.72 × 14,570.28
4. Step 4: Simplify right side
   42,644.88x = 932,100,442.76
5. Step 5: Solve for x
   x = 932,100,442.76/42,644.88
6. Step 6: Final answer
   x = 21,857.26