Finding the Fourth Proportional to 48,643.43, 72,972.72 and 20,563.61

Step by Step Solution

1. Step 1: Write the proportion equation
   48,643.43 : 72,972.72 = 20,563.61 : x
2. Step 2: Convert to fraction form
   48,643.43/72,972.72 = 20,563.61/x
3. Step 3: Cross multiply
   48,643.43x = 72,972.72 × 20,563.61
4. Step 4: Simplify right side
   48,643.43x = 1,500,582,189.86
5. Step 5: Solve for x
   x = 1,500,582,189.86/48,643.43
6. Step 6: Final answer
   x = 30,848.61