Finding the Fourth Proportional to 1,043.50, 1,439.62 and 670.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,043.50 : 1,439.62 = 670.42 : x
2. Step 2: Convert to fraction form
   1,043.50/1,439.62 = 670.42/x
3. Step 3: Cross multiply
   1,043.50x = 1,439.62 × 670.42
4. Step 4: Simplify right side
   1,043.50x = 965,150.04
5. Step 5: Solve for x
   x = 965,150.04/1,043.50
6. Step 6: Final answer
   x = 924.92