Finding the Fourth Proportional to 2,591.31, 3,885.74 and 946.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,591.31 : 3,885.74 = 946.70 : x
2. Step 2: Convert to fraction form
   2,591.31/3,885.74 = 946.70/x
3. Step 3: Cross multiply
   2,591.31x = 3,885.74 × 946.70
4. Step 4: Simplify right side
   2,591.31x = 3,678,645.74
5. Step 5: Solve for x
   x = 3,678,645.74/2,591.31
6. Step 6: Final answer
   x = 1,419.61