Finding the Fourth Proportional to 1,389.20, 2,081.98 and 566.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,389.20 : 2,081.98 = 566.50 : x
2. Step 2: Convert to fraction form
   1,389.20/2,081.98 = 566.50/x
3. Step 3: Cross multiply
   1,389.20x = 2,081.98 × 566.50
4. Step 4: Simplify right side
   1,389.20x = 1,179,441.67
5. Step 5: Solve for x
   x = 1,179,441.67/1,389.20
6. Step 6: Final answer
   x = 849.01