Finding the Fourth Proportional to 1,388.10, 2,081.90 and 566.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388.10 : 2,081.90 = 566.34 : x
2. Step 2: Convert to fraction form
   1,388.10/2,081.90 = 566.34/x
3. Step 3: Cross multiply
   1,388.10x = 2,081.90 × 566.34
4. Step 4: Simplify right side
   1,388.10x = 1,179,063.25
5. Step 5: Solve for x
   x = 1,179,063.25/1,388.10
6. Step 6: Final answer
   x = 849.41