Finding the Fourth Proportional to 2,100.06, 3,146.85 and 866.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.06 : 3,146.85 = 866.43 : x
2. Step 2: Convert to fraction form
   2,100.06/3,146.85 = 866.43/x
3. Step 3: Cross multiply
   2,100.06x = 3,146.85 × 866.43
4. Step 4: Simplify right side
   2,100.06x = 2,726,525.25
5. Step 5: Solve for x
   x = 2,726,525.25/2,100.06
6. Step 6: Final answer
   x = 1,298.31