Finding the Fourth Proportional to 1,685.02, 2,528.82 and 863.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,685.02 : 2,528.82 = 863.22 : x
2. Step 2: Convert to fraction form
   1,685.02/2,528.82 = 863.22/x
3. Step 3: Cross multiply
   1,685.02x = 2,528.82 × 863.22
4. Step 4: Simplify right side
   1,685.02x = 2,182,928.00
5. Step 5: Solve for x
   x = 2,182,928.00/1,685.02
6. Step 6: Final answer
   x = 1,295.49