Finding the Fourth Proportional to 1,561.14, 2,155.24 and 1,064.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.14 : 2,155.24 = 1,064.51 : x
2. Step 2: Convert to fraction form
   1,561.14/2,155.24 = 1,064.51/x
3. Step 3: Cross multiply
   1,561.14x = 2,155.24 × 1,064.51
4. Step 4: Simplify right side
   1,561.14x = 2,294,274.53
5. Step 5: Solve for x
   x = 2,294,274.53/1,561.14
6. Step 6: Final answer
   x = 1,469.61