Finding the Fourth Proportional to 1,410.31, 1,946.24 and 789.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,410.31 : 1,946.24 = 789.31 : x
2. Step 2: Convert to fraction form
   1,410.31/1,946.24 = 789.31/x
3. Step 3: Cross multiply
   1,410.31x = 1,946.24 × 789.31
4. Step 4: Simplify right side
   1,410.31x = 1,536,186.69
5. Step 5: Solve for x
   x = 1,536,186.69/1,410.31
6. Step 6: Final answer
   x = 1,089.25