Finding the Fourth Proportional to 13,100.60, 18,079.15 and 7,132.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,100.60 : 18,079.15 = 7,132.59 : x
2. Step 2: Convert to fraction form
   13,100.60/18,079.15 = 7,132.59/x
3. Step 3: Cross multiply
   13,100.60x = 18,079.15 × 7,132.59
4. Step 4: Simplify right side
   13,100.60x = 128,951,128.84
5. Step 5: Solve for x
   x = 128,951,128.84/13,100.60
6. Step 6: Final answer
   x = 9,843.15