Finding the Fourth Proportional to 13,100.98, 18,079.94 and 7,723.64

Step by Step Solution

1. Step 1: Write the proportion equation
   13,100.98 : 18,079.94 = 7,723.64 : x
2. Step 2: Convert to fraction form
   13,100.98/18,079.94 = 7,723.64/x
3. Step 3: Cross multiply
   13,100.98x = 18,079.94 × 7,723.64
4. Step 4: Simplify right side
   13,100.98x = 139,642,947.78
5. Step 5: Solve for x
   x = 139,642,947.78/13,100.98
6. Step 6: Final answer
   x = 10,658.97