Finding the Fourth Proportional to 21,443.96, 29,598.47 and 12,946.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,443.96 : 29,598.47 = 12,946.25 : x
2. Step 2: Convert to fraction form
   21,443.96/29,598.47 = 12,946.25/x
3. Step 3: Cross multiply
   21,443.96x = 29,598.47 × 12,946.25
4. Step 4: Simplify right side
   21,443.96x = 383,188,979.51
5. Step 5: Solve for x
   x = 383,188,979.51/21,443.96
6. Step 6: Final answer
   x = 17,869.32