Finding the Fourth Proportional to 9,389.28, 12,955.62 and 5,613.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,389.28 : 12,955.62 = 5,613.96 : x
2. Step 2: Convert to fraction form
   9,389.28/12,955.62 = 5,613.96/x
3. Step 3: Cross multiply
   9,389.28x = 12,955.62 × 5,613.96
4. Step 4: Simplify right side
   9,389.28x = 72,732,332.46
5. Step 5: Solve for x
   x = 72,732,332.46/9,389.28
6. Step 6: Final answer
   x = 7,746.32