Finding the Fourth Proportional to 12,498.31, 18,748.56 and 5,103.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,498.31 : 18,748.56 = 5,103.28 : x
2. Step 2: Convert to fraction form
   12,498.31/18,748.56 = 5,103.28/x
3. Step 3: Cross multiply
   12,498.31x = 18,748.56 × 5,103.28
4. Step 4: Simplify right side
   12,498.31x = 95,679,151.28
5. Step 5: Solve for x
   x = 95,679,151.28/12,498.31
6. Step 6: Final answer
   x = 7,655.37