Finding the Fourth Proportional to 12,909.60, 19,366.42 and 5,514.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,909.60 : 19,366.42 = 5,514.10 : x
2. Step 2: Convert to fraction form
   12,909.60/19,366.42 = 5,514.10/x
3. Step 3: Cross multiply
   12,909.60x = 19,366.42 × 5,514.10
4. Step 4: Simplify right side
   12,909.60x = 106,788,376.52
5. Step 5: Solve for x
   x = 106,788,376.52/12,909.60
6. Step 6: Final answer
   x = 8,272.01