Finding the Fourth Proportional to 42,470.48, 63,723.27 and 21,399.26

Step by Step Solution

1. Step 1: Write the proportion equation
   42,470.48 : 63,723.27 = 21,399.26 : x
2. Step 2: Convert to fraction form
   42,470.48/63,723.27 = 21,399.26/x
3. Step 3: Cross multiply
   42,470.48x = 63,723.27 × 21,399.26
4. Step 4: Simplify right side
   42,470.48x = 1,363,630,822.78
5. Step 5: Solve for x
   x = 1,363,630,822.78/42,470.48
6. Step 6: Final answer
   x = 32,107.73