Finding the Fourth Proportional to 1,559.55, 2,152.02 and 921.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,559.55 : 2,152.02 = 921.48 : x
2. Step 2: Convert to fraction form
   1,559.55/2,152.02 = 921.48/x
3. Step 3: Cross multiply
   1,559.55x = 2,152.02 × 921.48
4. Step 4: Simplify right side
   1,559.55x = 1,983,043.39
5. Step 5: Solve for x
   x = 1,983,043.39/1,559.55
6. Step 6: Final answer
   x = 1,271.55