Finding the Fourth Proportional to 1,491.27, 2,235.06 and 1,057.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,491.27 : 2,235.06 = 1,057.50 : x
2. Step 2: Convert to fraction form
   1,491.27/2,235.06 = 1,057.50/x
3. Step 3: Cross multiply
   1,491.27x = 2,235.06 × 1,057.50
4. Step 4: Simplify right side
   1,491.27x = 2,363,575.95
5. Step 5: Solve for x
   x = 2,363,575.95/1,491.27
6. Step 6: Final answer
   x = 1,584.94