Finding the Fourth Proportional to 12,300.30, 18,456.45 and 5,723.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,300.30 : 18,456.45 = 5,723.10 : x
2. Step 2: Convert to fraction form
   12,300.30/18,456.45 = 5,723.10/x
3. Step 3: Cross multiply
   12,300.30x = 18,456.45 × 5,723.10
4. Step 4: Simplify right side
   12,300.30x = 105,628,109.00
5. Step 5: Solve for x
   x = 105,628,109.00/12,300.30
6. Step 6: Final answer
   x = 8,587.44