Finding the Fourth Proportional to 13,402.99, 18,496.91 and 7,435.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,402.99 : 18,496.91 = 7,435.31 : x
2. Step 2: Convert to fraction form
   13,402.99/18,496.91 = 7,435.31/x
3. Step 3: Cross multiply
   13,402.99x = 18,496.91 × 7,435.31
4. Step 4: Simplify right side
   13,402.99x = 137,530,222.72
5. Step 5: Solve for x
   x = 137,530,222.72/13,402.99
6. Step 6: Final answer
   x = 10,261.16