Finding the Fourth Proportional to 42,469.98, 63,722.52 and 21,398.76

Step by Step Solution

1. Step 1: Write the proportion equation
   42,469.98 : 63,722.52 = 21,398.76 : x
2. Step 2: Convert to fraction form
   42,469.98/63,722.52 = 21,398.76/x
3. Step 3: Cross multiply
   42,469.98x = 63,722.52 × 21,398.76
4. Step 4: Simplify right side
   42,469.98x = 1,363,582,912.08
5. Step 5: Solve for x
   x = 1,363,582,912.08/42,469.98
6. Step 6: Final answer
   x = 32,106.98