Finding the Fourth Proportional to 1,009.87, 1,512.59 and 834.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,009.87 : 1,512.59 = 834.55 : x
2. Step 2: Convert to fraction form
   1,009.87/1,512.59 = 834.55/x
3. Step 3: Cross multiply
   1,009.87x = 1,512.59 × 834.55
4. Step 4: Simplify right side
   1,009.87x = 1,262,327.81
5. Step 5: Solve for x
   x = 1,262,327.81/1,009.87
6. Step 6: Final answer
   x = 1,249.99