Finding the Fourth Proportional to 12,151.67, 16,776.56 and 8,790.98

Step by Step Solution

1. Step 1: Write the proportion equation
   12,151.67 : 16,776.56 = 8,790.98 : x
2. Step 2: Convert to fraction form
   12,151.67/16,776.56 = 8,790.98/x
3. Step 3: Cross multiply
   12,151.67x = 16,776.56 × 8,790.98
4. Step 4: Simplify right side
   12,151.67x = 147,482,341.52
5. Step 5: Solve for x
   x = 147,482,341.52/12,151.67
6. Step 6: Final answer
   x = 12,136.80