Finding the Fourth Proportional to 13,400.59, 18,490.83 and 7,432.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,400.59 : 18,490.83 = 7,432.31 : x
2. Step 2: Convert to fraction form
   13,400.59/18,490.83 = 7,432.31/x
3. Step 3: Cross multiply
   13,400.59x = 18,490.83 × 7,432.31
4. Step 4: Simplify right side
   13,400.59x = 137,429,536.87
5. Step 5: Solve for x
   x = 137,429,536.87/13,400.59
6. Step 6: Final answer
   x = 10,255.48