Finding the Fourth Proportional to 14,018.78, 21,031.94 and 4,660.31

Step by Step Solution

1. Step 1: Write the proportion equation
   14,018.78 : 21,031.94 = 4,660.31 : x
2. Step 2: Convert to fraction form
   14,018.78/21,031.94 = 4,660.31/x
3. Step 3: Cross multiply
   14,018.78x = 21,031.94 × 4,660.31
4. Step 4: Simplify right side
   14,018.78x = 98,015,360.30
5. Step 5: Solve for x
   x = 98,015,360.30/14,018.78
6. Step 6: Final answer
   x = 6,991.72