Finding the Fourth Proportional to 13,402.64, 18,494.33 and 7,434.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,402.64 : 18,494.33 = 7,434.18 : x
2. Step 2: Convert to fraction form
   13,402.64/18,494.33 = 7,434.18/x
3. Step 3: Cross multiply
   13,402.64x = 18,494.33 × 7,434.18
4. Step 4: Simplify right side
   13,402.64x = 137,490,141.03
5. Step 5: Solve for x
   x = 137,490,141.03/13,402.64
6. Step 6: Final answer
   x = 10,258.44