Finding the Fourth Proportional to 72,748.86, 109,123.08 and 20,158.39

Step by Step Solution

1. Step 1: Write the proportion equation
   72,748.86 : 109,123.08 = 20,158.39 : x
2. Step 2: Convert to fraction form
   72,748.86/109,123.08 = 20,158.39/x
3. Step 3: Cross multiply
   72,748.86x = 109,123.08 × 20,158.39
4. Step 4: Simplify right side
   72,748.86x = 2,199,745,604.64
5. Step 5: Solve for x
   x = 2,199,745,604.64/72,748.86
6. Step 6: Final answer
   x = 30,237.53