Finding the Fourth Proportional to 9,426.72, 13,009.60 and 5,235.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,426.72 : 13,009.60 = 5,235.60 : x
2. Step 2: Convert to fraction form
   9,426.72/13,009.60 = 5,235.60/x
3. Step 3: Cross multiply
   9,426.72x = 13,009.60 × 5,235.60
4. Step 4: Simplify right side
   9,426.72x = 68,113,061.76
5. Step 5: Solve for x
   x = 68,113,061.76/9,426.72
6. Step 6: Final answer
   x = 7,225.53