Finding the Fourth Proportional to 1,906.55, 2,860.10 and 866.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,906.55 : 2,860.10 = 866.52 : x
2. Step 2: Convert to fraction form
   1,906.55/2,860.10 = 866.52/x
3. Step 3: Cross multiply
   1,906.55x = 2,860.10 × 866.52
4. Step 4: Simplify right side
   1,906.55x = 2,478,329.52
5. Step 5: Solve for x
   x = 2,478,329.52/1,906.55
6. Step 6: Final answer
   x = 1,299.91