Finding the Fourth Proportional to 13,426.72, 18,527.52 and 7,840.96

Step by Step Solution

1. Step 1: Write the proportion equation
   13,426.72 : 18,527.52 = 7,840.96 : x
2. Step 2: Convert to fraction form
   13,426.72/18,527.52 = 7,840.96/x
3. Step 3: Cross multiply
   13,426.72x = 18,527.52 × 7,840.96
4. Step 4: Simplify right side
   13,426.72x = 145,273,543.22
5. Step 5: Solve for x
   x = 145,273,543.22/13,426.72
6. Step 6: Final answer
   x = 10,819.73