Finding the Fourth Proportional to 13,061.79, 18,025.62 and 7,684.60

Step by Step Solution

1. Step 1: Write the proportion equation
   13,061.79 : 18,025.62 = 7,684.60 : x
2. Step 2: Convert to fraction form
   13,061.79/18,025.62 = 7,684.60/x
3. Step 3: Cross multiply
   13,061.79x = 18,025.62 × 7,684.60
4. Step 4: Simplify right side
   13,061.79x = 138,519,679.45
5. Step 5: Solve for x
   x = 138,519,679.45/13,061.79
6. Step 6: Final answer
   x = 10,604.96