Finding the Fourth Proportional to 12,586.49, 18,867.43 and 5,196.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,586.49 : 18,867.43 = 5,196.10 : x
2. Step 2: Convert to fraction form
   12,586.49/18,867.43 = 5,196.10/x
3. Step 3: Cross multiply
   12,586.49x = 18,867.43 × 5,196.10
4. Step 4: Simplify right side
   12,586.49x = 98,037,047.73
5. Step 5: Solve for x
   x = 98,037,047.73/12,586.49
6. Step 6: Final answer
   x = 7,789.07