Finding the Fourth Proportional to 35,328.72, 48,753.50 and 20,221.31

Step by Step Solution

1. Step 1: Write the proportion equation
   35,328.72 : 48,753.50 = 20,221.31 : x
2. Step 2: Convert to fraction form
   35,328.72/48,753.50 = 20,221.31/x
3. Step 3: Cross multiply
   35,328.72x = 48,753.50 × 20,221.31
4. Step 4: Simplify right side
   35,328.72x = 985,859,657.86
5. Step 5: Solve for x
   x = 985,859,657.86/35,328.72
6. Step 6: Final answer
   x = 27,905.33