Finding the Fourth Proportional to 1,560.77, 2,153.49 and 1,436.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,560.77 : 2,153.49 = 1,436.30 : x
2. Step 2: Convert to fraction form
   1,560.77/2,153.49 = 1,436.30/x
3. Step 3: Cross multiply
   1,560.77x = 2,153.49 × 1,436.30
4. Step 4: Simplify right side
   1,560.77x = 3,093,057.69
5. Step 5: Solve for x
   x = 3,093,057.69/1,560.77
6. Step 6: Final answer
   x = 1,981.75