Finding the Fourth Proportional to 1,410.91, 1,947.05 and 789.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,410.91 : 1,947.05 = 789.91 : x
2. Step 2: Convert to fraction form
   1,410.91/1,947.05 = 789.91/x
3. Step 3: Cross multiply
   1,410.91x = 1,947.05 × 789.91
4. Step 4: Simplify right side
   1,410.91x = 1,537,984.53
5. Step 5: Solve for x
   x = 1,537,984.53/1,410.91
6. Step 6: Final answer
   x = 1,090.07