Finding the Fourth Proportional to 21,547.89, 32,355.86 and 12,821.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,547.89 : 32,355.86 = 12,821.76 : x
2. Step 2: Convert to fraction form
   21,547.89/32,355.86 = 12,821.76/x
3. Step 3: Cross multiply
   21,547.89x = 32,355.86 × 12,821.76
4. Step 4: Simplify right side
   21,547.89x = 414,859,007.40
5. Step 5: Solve for x
   x = 414,859,007.40/21,547.89
6. Step 6: Final answer
   x = 19,252.88