Finding the Fourth Proportional to 1,491.50, 2,058.37 and 862.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,491.50 : 2,058.37 = 862.15 : x
2. Step 2: Convert to fraction form
   1,491.50/2,058.37 = 862.15/x
3. Step 3: Cross multiply
   1,491.50x = 2,058.37 × 862.15
4. Step 4: Simplify right side
   1,491.50x = 1,774,623.70
5. Step 5: Solve for x
   x = 1,774,623.70/1,491.50
6. Step 6: Final answer
   x = 1,189.82