Finding the Fourth Proportional to 1,048.34, 1,569.72 and 866.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,048.34 : 1,569.72 = 866.54 : x
2. Step 2: Convert to fraction form
   1,048.34/1,569.72 = 866.54/x
3. Step 3: Cross multiply
   1,048.34x = 1,569.72 × 866.54
4. Step 4: Simplify right side
   1,048.34x = 1,360,225.17
5. Step 5: Solve for x
   x = 1,360,225.17/1,048.34
6. Step 6: Final answer
   x = 1,297.50