Finding the Fourth Proportional to 9,478.72, 13,081.42 and 5,230.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,478.72 : 13,081.42 = 5,230.18 : x
2. Step 2: Convert to fraction form
   9,478.72/13,081.42 = 5,230.18/x
3. Step 3: Cross multiply
   9,478.72x = 13,081.42 × 5,230.18
4. Step 4: Simplify right side
   9,478.72x = 68,418,181.26
5. Step 5: Solve for x
   x = 68,418,181.26/9,478.72
6. Step 6: Final answer
   x = 7,218.08