Finding the Fourth Proportional to 13,389.68, 18,475.35 and 7,723.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,389.68 : 18,475.35 = 7,723.10 : x
2. Step 2: Convert to fraction form
   13,389.68/18,475.35 = 7,723.10/x
3. Step 3: Cross multiply
   13,389.68x = 18,475.35 × 7,723.10
4. Step 4: Simplify right side
   13,389.68x = 142,686,975.59
5. Step 5: Solve for x
   x = 142,686,975.59/13,389.68
6. Step 6: Final answer
   x = 10,656.49