Finding the Fourth Proportional to 1,805.59, 2,491.63 and 1,059.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,805.59 : 2,491.63 = 1,059.51 : x
2. Step 2: Convert to fraction form
   1,805.59/2,491.63 = 1,059.51/x
3. Step 3: Cross multiply
   1,805.59x = 2,491.63 × 1,059.51
4. Step 4: Simplify right side
   1,805.59x = 2,639,913.60
5. Step 5: Solve for x
   x = 2,639,913.60/1,805.59
6. Step 6: Final answer
   x = 1,462.08