Finding the Fourth Proportional to 12,776.94, 17,641.80 and 12,572.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,776.94 : 17,641.80 = 12,572.82 : x
2. Step 2: Convert to fraction form
   12,776.94/17,641.80 = 12,572.82/x
3. Step 3: Cross multiply
   12,776.94x = 17,641.80 × 12,572.82
4. Step 4: Simplify right side
   12,776.94x = 221,807,175.88
5. Step 5: Solve for x
   x = 221,807,175.88/12,776.94
6. Step 6: Final answer
   x = 17,359.96