Finding the Fourth Proportional to 13,100.09, 18,078.53 and 7,132.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,100.09 : 18,078.53 = 7,132.16 : x
2. Step 2: Convert to fraction form
   13,100.09/18,078.53 = 7,132.16/x
3. Step 3: Cross multiply
   13,100.09x = 18,078.53 × 7,132.16
4. Step 4: Simplify right side
   13,100.09x = 128,938,842.47
5. Step 5: Solve for x
   x = 128,938,842.47/13,100.09
6. Step 6: Final answer
   x = 9,842.60