Finding the Fourth Proportional to 9,739.42, 13,440.38 and 5,263.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,739.42 : 13,440.38 = 5,263.18 : x
2. Step 2: Convert to fraction form
   9,739.42/13,440.38 = 5,263.18/x
3. Step 3: Cross multiply
   9,739.42x = 13,440.38 × 5,263.18
4. Step 4: Simplify right side
   9,739.42x = 70,739,139.21
5. Step 5: Solve for x
   x = 70,739,139.21/9,739.42
6. Step 6: Final answer
   x = 7,263.18