Finding the Fourth Proportional to 12,514.31, 18,776.69 and 5,490.70

Step by Step Solution

1. Step 1: Write the proportion equation
   12,514.31 : 18,776.69 = 5,490.70 : x
2. Step 2: Convert to fraction form
   12,514.31/18,776.69 = 5,490.70/x
3. Step 3: Cross multiply
   12,514.31x = 18,776.69 × 5,490.70
4. Step 4: Simplify right side
   12,514.31x = 103,097,138.57
5. Step 5: Solve for x
   x = 103,097,138.57/12,514.31
6. Step 6: Final answer
   x = 8,238.34