Finding the Fourth Proportional to 1,561.10, 2,152.55 and 1,064.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.10 : 2,152.55 = 1,064.03 : x
2. Step 2: Convert to fraction form
   1,561.10/2,152.55 = 1,064.03/x
3. Step 3: Cross multiply
   1,561.10x = 2,152.55 × 1,064.03
4. Step 4: Simplify right side
   1,561.10x = 2,290,361.69
5. Step 5: Solve for x
   x = 2,290,361.69/1,561.10
6. Step 6: Final answer
   x = 1,467.15