Finding the Fourth Proportional to 13,402.96, 18,496.16 and 7,434.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,402.96 : 18,496.16 = 7,434.72 : x
2. Step 2: Convert to fraction form
   13,402.96/18,496.16 = 7,434.72/x
3. Step 3: Cross multiply
   13,402.96x = 18,496.16 × 7,434.72
4. Step 4: Simplify right side
   13,402.96x = 137,513,770.68
5. Step 5: Solve for x
   x = 137,513,770.68/13,402.96
6. Step 6: Final answer
   x = 10,259.96