Finding the Fourth Proportional to 42,638.90, 63,921.88 and 16,362.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,638.90 : 63,921.88 = 16,362.50 : x
2. Step 2: Convert to fraction form
   42,638.90/63,921.88 = 16,362.50/x
3. Step 3: Cross multiply
   42,638.90x = 63,921.88 × 16,362.50
4. Step 4: Simplify right side
   42,638.90x = 1,045,921,761.50
5. Step 5: Solve for x
   x = 1,045,921,761.50/42,638.90
6. Step 6: Final answer
   x = 24,529.75