Finding the Fourth Proportional to 9,478.86, 13,080.74 and 5,229.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,478.86 : 13,080.74 = 5,229.96 : x
2. Step 2: Convert to fraction form
   9,478.86/13,080.74 = 5,229.96/x
3. Step 3: Cross multiply
   9,478.86x = 13,080.74 × 5,229.96
4. Step 4: Simplify right side
   9,478.86x = 68,411,671.77
5. Step 5: Solve for x
   x = 68,411,671.77/9,478.86
6. Step 6: Final answer
   x = 7,217.29