Finding the Fourth Proportional to 21,300.18, 31,964.49 and 7,449.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,300.18 : 31,964.49 = 7,449.18 : x
2. Step 2: Convert to fraction form
   21,300.18/31,964.49 = 7,449.18/x
3. Step 3: Cross multiply
   21,300.18x = 31,964.49 × 7,449.18
4. Step 4: Simplify right side
   21,300.18x = 238,109,239.62
5. Step 5: Solve for x
   x = 238,109,239.62/21,300.18
6. Step 6: Final answer
   x = 11,178.74