Finding the Fourth Proportional to 9,873.31, 13,626.10 and 5,397.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,873.31 : 13,626.10 = 5,397.72 : x
2. Step 2: Convert to fraction form
   9,873.31/13,626.10 = 5,397.72/x
3. Step 3: Cross multiply
   9,873.31x = 13,626.10 × 5,397.72
4. Step 4: Simplify right side
   9,873.31x = 73,549,889.61
5. Step 5: Solve for x
   x = 73,549,889.61/9,873.31
6. Step 6: Final answer
   x = 7,449.37