Finding the Fourth Proportional to 9,690.34, 13,372.23 and 5,383.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,690.34 : 13,372.23 = 5,383.15 : x
2. Step 2: Convert to fraction form
   9,690.34/13,372.23 = 5,383.15/x
3. Step 3: Cross multiply
   9,690.34x = 13,372.23 × 5,383.15
4. Step 4: Simplify right side
   9,690.34x = 71,984,719.92
5. Step 5: Solve for x
   x = 71,984,719.92/9,690.34
6. Step 6: Final answer
   x = 7,428.50