Finding the Fourth Proportional to 1,855.91, 2,561.31 and 1,059.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,855.91 : 2,561.31 = 1,059.48 : x
2. Step 2: Convert to fraction form
   1,855.91/2,561.31 = 1,059.48/x
3. Step 3: Cross multiply
   1,855.91x = 2,561.31 × 1,059.48
4. Step 4: Simplify right side
   1,855.91x = 2,713,638.61
5. Step 5: Solve for x
   x = 2,713,638.61/1,855.91
6. Step 6: Final answer
   x = 1,462.16