Finding the Fourth Proportional to 13,098.61, 18,076.15 and 7,130.33

Step by Step Solution

1. Step 1: Write the proportion equation
   13,098.61 : 18,076.15 = 7,130.33 : x
2. Step 2: Convert to fraction form
   13,098.61/18,076.15 = 7,130.33/x
3. Step 3: Cross multiply
   13,098.61x = 18,076.15 × 7,130.33
4. Step 4: Simplify right side
   13,098.61x = 128,888,788.60
5. Step 5: Solve for x
   x = 128,888,788.60/13,098.61
6. Step 6: Final answer
   x = 9,839.89