Finding the Fourth Proportional to 9,289.82, 12,820.62 and 5,312.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,289.82 : 12,820.62 = 5,312.18 : x
2. Step 2: Convert to fraction form
   9,289.82/12,820.62 = 5,312.18/x
3. Step 3: Cross multiply
   9,289.82x = 12,820.62 × 5,312.18
4. Step 4: Simplify right side
   9,289.82x = 68,105,441.15
5. Step 5: Solve for x
   x = 68,105,441.15/9,289.82
6. Step 6: Final answer
   x = 7,331.19