Finding the Fourth Proportional to 1,597.59, 2,395.78 and 866.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,597.59 : 2,395.78 = 866.77 : x
2. Step 2: Convert to fraction form
   1,597.59/2,395.78 = 866.77/x
3. Step 3: Cross multiply
   1,597.59x = 2,395.78 × 866.77
4. Step 4: Simplify right side
   1,597.59x = 2,076,582.07
5. Step 5: Solve for x
   x = 2,076,582.07/1,597.59
6. Step 6: Final answer
   x = 1,299.82