Finding the Fourth Proportional to 1,561.57, 2,153.54 and 1,036.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.57 : 2,153.54 = 1,036.69 : x
2. Step 2: Convert to fraction form
   1,561.57/2,153.54 = 1,036.69/x
3. Step 3: Cross multiply
   1,561.57x = 2,153.54 × 1,036.69
4. Step 4: Simplify right side
   1,561.57x = 2,232,550.59
5. Step 5: Solve for x
   x = 2,232,550.59/1,561.57
6. Step 6: Final answer
   x = 1,429.69