Finding the Fourth Proportional to 1,433.51, 1,977.81 and 928.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.51 : 1,977.81 = 928.57 : x
2. Step 2: Convert to fraction form
   1,433.51/1,977.81 = 928.57/x
3. Step 3: Cross multiply
   1,433.51x = 1,977.81 × 928.57
4. Step 4: Simplify right side
   1,433.51x = 1,836,535.03
5. Step 5: Solve for x
   x = 1,836,535.03/1,433.51
6. Step 6: Final answer
   x = 1,281.15