Finding the Fourth Proportional to 10,482.89, 15,726.08 and 5,218.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,482.89 : 15,726.08 = 5,218.18 : x
2. Step 2: Convert to fraction form
   10,482.89/15,726.08 = 5,218.18/x
3. Step 3: Cross multiply
   10,482.89x = 15,726.08 × 5,218.18
4. Step 4: Simplify right side
   10,482.89x = 82,061,489.86
5. Step 5: Solve for x
   x = 82,061,489.86/10,482.89
6. Step 6: Final answer
   x = 7,828.14