Finding the Fourth Proportional to 13,731.28, 18,951.90 and 7,763.02

Step by Step Solution

1. Step 1: Write the proportion equation
   13,731.28 : 18,951.90 = 7,763.02 : x
2. Step 2: Convert to fraction form
   13,731.28/18,951.90 = 7,763.02/x
3. Step 3: Cross multiply
   13,731.28x = 18,951.90 × 7,763.02
4. Step 4: Simplify right side
   13,731.28x = 147,123,978.74
5. Step 5: Solve for x
   x = 147,123,978.74/13,731.28
6. Step 6: Final answer
   x = 10,714.51