Finding the Fourth Proportional to 72,713.70, 109,076.76 and 20,123.10

Step by Step Solution

1. Step 1: Write the proportion equation
   72,713.70 : 109,076.76 = 20,123.10 : x
2. Step 2: Convert to fraction form
   72,713.70/109,076.76 = 20,123.10/x
3. Step 3: Cross multiply
   72,713.70x = 109,076.76 × 20,123.10
4. Step 4: Simplify right side
   72,713.70x = 2,194,962,549.16
5. Step 5: Solve for x
   x = 2,194,962,549.16/72,713.70
6. Step 6: Final answer
   x = 30,186.37