Finding the Fourth Proportional to 9,789.10, 13,508.67 and 5,312.62

Step by Step Solution

1. Step 1: Write the proportion equation
   9,789.10 : 13,508.67 = 5,312.62 : x
2. Step 2: Convert to fraction form
   9,789.10/13,508.67 = 5,312.62/x
3. Step 3: Cross multiply
   9,789.10x = 13,508.67 × 5,312.62
4. Step 4: Simplify right side
   9,789.10x = 71,766,430.42
5. Step 5: Solve for x
   x = 71,766,430.42/9,789.10
6. Step 6: Final answer
   x = 7,331.26