Finding the Fourth Proportional to 1,312.35, 1,967.31 and 662.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,312.35 : 1,967.31 = 662.33 : x
2. Step 2: Convert to fraction form
   1,312.35/1,967.31 = 662.33/x
3. Step 3: Cross multiply
   1,312.35x = 1,967.31 × 662.33
4. Step 4: Simplify right side
   1,312.35x = 1,303,008.43
5. Step 5: Solve for x
   x = 1,303,008.43/1,312.35
6. Step 6: Final answer
   x = 992.88