Finding the Fourth Proportional to 1,561.32, 2,152.62 and 1,281.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.32 : 2,152.62 = 1,281.42 : x
2. Step 2: Convert to fraction form
   1,561.32/2,152.62 = 1,281.42/x
3. Step 3: Cross multiply
   1,561.32x = 2,152.62 × 1,281.42
4. Step 4: Simplify right side
   1,561.32x = 2,758,410.32
5. Step 5: Solve for x
   x = 2,758,410.32/1,561.32
6. Step 6: Final answer
   x = 1,766.72