Finding the Fourth Proportional to 21,048.12, 29,051.46 and 12,663

Step by Step Solution

1. Step 1: Write the proportion equation
   21,048.12 : 29,051.46 = 12,663 : x
2. Step 2: Convert to fraction form
   21,048.12/29,051.46 = 12,663/x
3. Step 3: Cross multiply
   21,048.12x = 29,051.46 × 12,663
4. Step 4: Simplify right side
   21,048.12x = 367,878,637.98
5. Step 5: Solve for x
   x = 367,878,637.98/21,048.12
6. Step 6: Final answer
   x = 17,477.98