Finding the Fourth Proportional to 13,180.89, 18,190.71 and 7,517.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,180.89 : 18,190.71 = 7,517.42 : x
2. Step 2: Convert to fraction form
   13,180.89/18,190.71 = 7,517.42/x
3. Step 3: Cross multiply
   13,180.89x = 18,190.71 × 7,517.42
4. Step 4: Simplify right side
   13,180.89x = 136,747,088.02
5. Step 5: Solve for x
   x = 136,747,088.02/13,180.89
6. Step 6: Final answer
   x = 10,374.65