Finding the Fourth Proportional to 272,288.89, 408,433.16 and 82,748.78

Step by Step Solution

1. Step 1: Write the proportion equation
   272,288.89 : 408,433.16 = 82,748.78 : x
2. Step 2: Convert to fraction form
   272,288.89/408,433.16 = 82,748.78/x
3. Step 3: Cross multiply
   272,288.89x = 408,433.16 × 82,748.78
4. Step 4: Simplify right side
   272,288.89x = 33,797,345,397.88
5. Step 5: Solve for x
   x = 33,797,345,397.88/272,288.89
6. Step 6: Final answer
   x = 124,123.12