Finding the Fourth Proportional to 21,477.84, 29,640.78 and 12,047.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,477.84 : 29,640.78 = 12,047.82 : x
2. Step 2: Convert to fraction form
   21,477.84/29,640.78 = 12,047.82/x
3. Step 3: Cross multiply
   21,477.84x = 29,640.78 × 12,047.82
4. Step 4: Simplify right side
   21,477.84x = 357,106,782.10
5. Step 5: Solve for x
   x = 357,106,782.10/21,477.84
6. Step 6: Final answer
   x = 16,626.75