Finding the Fourth Proportional to 12,766.84, 17,616.89 and 7,100.66

Step by Step Solution

1. Step 1: Write the proportion equation
   12,766.84 : 17,616.89 = 7,100.66 : x
2. Step 2: Convert to fraction form
   12,766.84/17,616.89 = 7,100.66/x
3. Step 3: Cross multiply
   12,766.84x = 17,616.89 × 7,100.66
4. Step 4: Simplify right side
   12,766.84x = 125,091,607.94
5. Step 5: Solve for x
   x = 125,091,607.94/12,766.84
6. Step 6: Final answer
   x = 9,798.17