Finding the Fourth Proportional to 9,874.31, 13,626.51 and 5,398.06

Step by Step Solution

1. Step 1: Write the proportion equation
   9,874.31 : 13,626.51 = 5,398.06 : x
2. Step 2: Convert to fraction form
   9,874.31/13,626.51 = 5,398.06/x
3. Step 3: Cross multiply
   9,874.31x = 13,626.51 × 5,398.06
4. Step 4: Simplify right side
   9,874.31x = 73,556,718.57
5. Step 5: Solve for x
   x = 73,556,718.57/9,874.31
6. Step 6: Final answer
   x = 7,449.30