Finding the Fourth Proportional to 21,549.89, 32,358.86 and 12,823.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,549.89 : 32,358.86 = 12,823.76 : x
2. Step 2: Convert to fraction form
   21,549.89/32,358.86 = 12,823.76/x
3. Step 3: Cross multiply
   21,549.89x = 32,358.86 × 12,823.76
4. Step 4: Simplify right side
   21,549.89x = 414,962,254.51
5. Step 5: Solve for x
   x = 414,962,254.51/21,549.89
6. Step 6: Final answer
   x = 19,255.89