Finding the Fourth Proportional to 49,724.16, 74,597.20 and 21,648.72

Step by Step Solution

1. Step 1: Write the proportion equation
   49,724.16 : 74,597.20 = 21,648.72 : x
2. Step 2: Convert to fraction form
   49,724.16/74,597.20 = 21,648.72/x
3. Step 3: Cross multiply
   49,724.16x = 74,597.20 × 21,648.72
4. Step 4: Simplify right side
   49,724.16x = 1,614,933,895.58
5. Step 5: Solve for x
   x = 1,614,933,895.58/49,724.16
6. Step 6: Final answer
   x = 32,477.85