Finding the Fourth Proportional to 1,363.99, 1,881.30 and 866.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,363.99 : 1,881.30 = 866.20 : x
2. Step 2: Convert to fraction form
   1,363.99/1,881.30 = 866.20/x
3. Step 3: Cross multiply
   1,363.99x = 1,881.30 × 866.20
4. Step 4: Simplify right side
   1,363.99x = 1,629,582.06
5. Step 5: Solve for x
   x = 1,629,582.06/1,363.99
6. Step 6: Final answer
   x = 1,194.72