Finding the Fourth Proportional to 21,061.84, 31,592.86 and 8,581.98

Step by Step Solution

1. Step 1: Write the proportion equation
   21,061.84 : 31,592.86 = 8,581.98 : x
2. Step 2: Convert to fraction form
   21,061.84/31,592.86 = 8,581.98/x
3. Step 3: Cross multiply
   21,061.84x = 31,592.86 × 8,581.98
4. Step 4: Simplify right side
   21,061.84x = 271,129,292.66
5. Step 5: Solve for x
   x = 271,129,292.66/21,061.84
6. Step 6: Final answer
   x = 12,873.01