Finding the Fourth Proportional to 13,402.59, 18,493.98 and 7,432.80

Step by Step Solution

1. Step 1: Write the proportion equation
   13,402.59 : 18,493.98 = 7,432.80 : x
2. Step 2: Convert to fraction form
   13,402.59/18,493.98 = 7,432.80/x
3. Step 3: Cross multiply
   13,402.59x = 18,493.98 × 7,432.80
4. Step 4: Simplify right side
   13,402.59x = 137,462,054.54
5. Step 5: Solve for x
   x = 137,462,054.54/13,402.59
6. Step 6: Final answer
   x = 10,256.38