Finding the Fourth Proportional to 9,842.56, 13,582.72 and 5,366.40

Step by Step Solution

1. Step 1: Write the proportion equation
   9,842.56 : 13,582.72 = 5,366.40 : x
2. Step 2: Convert to fraction form
   9,842.56/13,582.72 = 5,366.40/x
3. Step 3: Cross multiply
   9,842.56x = 13,582.72 × 5,366.40
4. Step 4: Simplify right side
   9,842.56x = 72,890,308.61
5. Step 5: Solve for x
   x = 72,890,308.61/9,842.56
6. Step 6: Final answer
   x = 7,405.63