Finding the Fourth Proportional to 1,560.17, 2,339.79 and 1,285.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,560.17 : 2,339.79 = 1,285.58 : x
2. Step 2: Convert to fraction form
   1,560.17/2,339.79 = 1,285.58/x
3. Step 3: Cross multiply
   1,560.17x = 2,339.79 × 1,285.58
4. Step 4: Simplify right side
   1,560.17x = 3,007,987.23
5. Step 5: Solve for x
   x = 3,007,987.23/1,560.17
6. Step 6: Final answer
   x = 1,927.99