Finding the Fourth Proportional to 13,402.91, 18,495.77 and 7,434.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,402.91 : 18,495.77 = 7,434.42 : x
2. Step 2: Convert to fraction form
   13,402.91/18,495.77 = 7,434.42/x
3. Step 3: Cross multiply
   13,402.91x = 18,495.77 × 7,434.42
4. Step 4: Simplify right side
   13,402.91x = 137,505,285.23
5. Step 5: Solve for x
   x = 137,505,285.23/13,402.91
6. Step 6: Final answer
   x = 10,259.36