Finding the Fourth Proportional to 23,638.65, 32,621.54 and 13,028.31

Step by Step Solution

1. Step 1: Write the proportion equation
   23,638.65 : 32,621.54 = 13,028.31 : x
2. Step 2: Convert to fraction form
   23,638.65/32,621.54 = 13,028.31/x
3. Step 3: Cross multiply
   23,638.65x = 32,621.54 × 13,028.31
4. Step 4: Simplify right side
   23,638.65x = 425,003,470.66
5. Step 5: Solve for x
   x = 425,003,470.66/23,638.65
6. Step 6: Final answer
   x = 17,979.18