Finding the Fourth Proportional to 73,131.76, 109,701.89 and 20,545.34

Step by Step Solution

1. Step 1: Write the proportion equation
   73,131.76 : 109,701.89 = 20,545.34 : x
2. Step 2: Convert to fraction form
   73,131.76/109,701.89 = 20,545.34/x
3. Step 3: Cross multiply
   73,131.76x = 109,701.89 × 20,545.34
4. Step 4: Simplify right side
   73,131.76x = 2,253,862,525.97
5. Step 5: Solve for x
   x = 2,253,862,525.97/73,131.76
6. Step 6: Final answer
   x = 30,819.20