Finding the Fourth Proportional to 13,100.54, 18,078.98 and 7,132.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,100.54 : 18,078.98 = 7,132.31 : x
2. Step 2: Convert to fraction form
   13,100.54/18,078.98 = 7,132.31/x
3. Step 3: Cross multiply
   13,100.54x = 18,078.98 × 7,132.31
4. Step 4: Simplify right side
   13,100.54x = 128,944,817.28
5. Step 5: Solve for x
   x = 128,944,817.28/13,100.54
6. Step 6: Final answer
   x = 9,842.71