Finding the Fourth Proportional to 14,100.78, 21,026.68 and 13,974.24

Step by Step Solution

1. Step 1: Write the proportion equation
   14,100.78 : 21,026.68 = 13,974.24 : x
2. Step 2: Convert to fraction form
   14,100.78/21,026.68 = 13,974.24/x
3. Step 3: Cross multiply
   14,100.78x = 21,026.68 × 13,974.24
4. Step 4: Simplify right side
   14,100.78x = 293,831,872.72
5. Step 5: Solve for x
   x = 293,831,872.72/14,100.78
6. Step 6: Final answer
   x = 20,837.99