Finding the Fourth Proportional to 1,986.12, 2,975.94 and 1,766.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,986.12 : 2,975.94 = 1,766.34 : x
2. Step 2: Convert to fraction form
   1,986.12/2,975.94 = 1,766.34/x
3. Step 3: Cross multiply
   1,986.12x = 2,975.94 × 1,766.34
4. Step 4: Simplify right side
   1,986.12x = 5,256,521.86
5. Step 5: Solve for x
   x = 5,256,521.86/1,986.12
6. Step 6: Final answer
   x = 2,646.63