Finding the Fourth Proportional to 13,479.12, 18,601.76 and 7,510.79

Step by Step Solution

1. Step 1: Write the proportion equation
   13,479.12 : 18,601.76 = 7,510.79 : x
2. Step 2: Convert to fraction form
   13,479.12/18,601.76 = 7,510.79/x
3. Step 3: Cross multiply
   13,479.12x = 18,601.76 × 7,510.79
4. Step 4: Simplify right side
   13,479.12x = 139,713,978.27
5. Step 5: Solve for x
   x = 139,713,978.27/13,479.12
6. Step 6: Final answer
   x = 10,365.22