Finding the Fourth Proportional to 1,507.92, 2,262.12 and 857.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,507.92 : 2,262.12 = 857.31 : x
2. Step 2: Convert to fraction form
   1,507.92/2,262.12 = 857.31/x
3. Step 3: Cross multiply
   1,507.92x = 2,262.12 × 857.31
4. Step 4: Simplify right side
   1,507.92x = 1,939,338.10
5. Step 5: Solve for x
   x = 1,939,338.10/1,507.92
6. Step 6: Final answer
   x = 1,286.10