Finding the Fourth Proportional to 12,981.76, 19,473.45 and 8,819.98

Step by Step Solution

1. Step 1: Write the proportion equation
   12,981.76 : 19,473.45 = 8,819.98 : x
2. Step 2: Convert to fraction form
   12,981.76/19,473.45 = 8,819.98/x
3. Step 3: Cross multiply
   12,981.76x = 19,473.45 × 8,819.98
4. Step 4: Simplify right side
   12,981.76x = 171,755,439.53
5. Step 5: Solve for x
   x = 171,755,439.53/12,981.76
6. Step 6: Final answer
   x = 13,230.52