Finding the Fourth Proportional to 1,386.48, 2,081.76 and 566.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,386.48 : 2,081.76 = 566.34 : x
2. Step 2: Convert to fraction form
   1,386.48/2,081.76 = 566.34/x
3. Step 3: Cross multiply
   1,386.48x = 2,081.76 × 566.34
4. Step 4: Simplify right side
   1,386.48x = 1,178,983.96
5. Step 5: Solve for x
   x = 1,178,983.96/1,386.48
6. Step 6: Final answer
   x = 850.34