Finding the Fourth Proportional to 2,072.67, 2,860.82 and 1,188.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.67 : 2,860.82 = 1,188.96 : x
2. Step 2: Convert to fraction form
   2,072.67/2,860.82 = 1,188.96/x
3. Step 3: Cross multiply
   2,072.67x = 2,860.82 × 1,188.96
4. Step 4: Simplify right side
   2,072.67x = 3,401,400.55
5. Step 5: Solve for x
   x = 3,401,400.55/2,072.67
6. Step 6: Final answer
   x = 1,641.07