Finding the Fourth Proportional to 72,747, 109,120.62 and 20,156.61

Step by Step Solution

1. Step 1: Write the proportion equation
   72,747 : 109,120.62 = 20,156.61 : x
2. Step 2: Convert to fraction form
   72,747/109,120.62 = 20,156.61/x
3. Step 3: Cross multiply
   72,747x = 109,120.62 × 20,156.61
4. Step 4: Simplify right side
   72,747x = 2,199,501,780.30
5. Step 5: Solve for x
   x = 2,199,501,780.30/72,747
6. Step 6: Final answer
   x = 30,234.95