Finding the Fourth Proportional to 13,609.67, 18,780.71 and 7,560.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,609.67 : 18,780.71 = 7,560.30 : x
2. Step 2: Convert to fraction form
   13,609.67/18,780.71 = 7,560.30/x
3. Step 3: Cross multiply
   13,609.67x = 18,780.71 × 7,560.30
4. Step 4: Simplify right side
   13,609.67x = 141,987,801.81
5. Step 5: Solve for x
   x = 141,987,801.81/13,609.67
6. Step 6: Final answer
   x = 10,432.86