Finding the Fourth Proportional to 2,151.98, 2,969.87 and 1,207.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.98 : 2,969.87 = 1,207.84 : x
2. Step 2: Convert to fraction form
   2,151.98/2,969.87 = 1,207.84/x
3. Step 3: Cross multiply
   2,151.98x = 2,969.87 × 1,207.84
4. Step 4: Simplify right side
   2,151.98x = 3,587,127.78
5. Step 5: Solve for x
   x = 3,587,127.78/2,151.98
6. Step 6: Final answer
   x = 1,666.90