Finding the Fourth Proportional to 2,086.60, 2,878.56 and 1,202.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.60 : 2,878.56 = 1,202.08 : x
2. Step 2: Convert to fraction form
   2,086.60/2,878.56 = 1,202.08/x
3. Step 3: Cross multiply
   2,086.60x = 2,878.56 × 1,202.08
4. Step 4: Simplify right side
   2,086.60x = 3,460,259.40
5. Step 5: Solve for x
   x = 3,460,259.40/2,086.60
6. Step 6: Final answer
   x = 1,658.32