Finding the Fourth Proportional to 1,387.32, 1,912.57 and 967.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,387.32 : 1,912.57 = 967.06 : x
2. Step 2: Convert to fraction form
   1,387.32/1,912.57 = 967.06/x
3. Step 3: Cross multiply
   1,387.32x = 1,912.57 × 967.06
4. Step 4: Simplify right side
   1,387.32x = 1,849,569.94
5. Step 5: Solve for x
   x = 1,849,569.94/1,387.32
6. Step 6: Final answer
   x = 1,333.20