Finding the Fourth Proportional to 13,402.71, 18,495.54 and 7,434.27

Step by Step Solution

1. Step 1: Write the proportion equation
   13,402.71 : 18,495.54 = 7,434.27 : x
2. Step 2: Convert to fraction form
   13,402.71/18,495.54 = 7,434.27/x
3. Step 3: Cross multiply
   13,402.71x = 18,495.54 × 7,434.27
4. Step 4: Simplify right side
   13,402.71x = 137,500,838.16
5. Step 5: Solve for x
   x = 137,500,838.16/13,402.71
6. Step 6: Final answer
   x = 10,259.18