Finding the Fourth Proportional to 9,405.60, 12,981.36 and 5,426.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,405.60 : 12,981.36 = 5,426.04 : x
2. Step 2: Convert to fraction form
   9,405.60/12,981.36 = 5,426.04/x
3. Step 3: Cross multiply
   9,405.60x = 12,981.36 × 5,426.04
4. Step 4: Simplify right side
   9,405.60x = 70,437,378.61
5. Step 5: Solve for x
   x = 70,437,378.61/9,405.60
6. Step 6: Final answer
   x = 7,488.88