Finding the Fourth Proportional to 21,948.02, 30,288.66 and 12,389.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,948.02 : 30,288.66 = 12,389.82 : x
2. Step 2: Convert to fraction form
   21,948.02/30,288.66 = 12,389.82/x
3. Step 3: Cross multiply
   21,948.02x = 30,288.66 × 12,389.82
4. Step 4: Simplify right side
   21,948.02x = 375,271,045.44
5. Step 5: Solve for x
   x = 375,271,045.44/21,948.02
6. Step 6: Final answer
   x = 17,098.17