Finding the Fourth Proportional to 2,546.45, 3,817.31 and 987.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,546.45 : 3,817.31 = 987.47 : x
2. Step 2: Convert to fraction form
   2,546.45/3,817.31 = 987.47/x
3. Step 3: Cross multiply
   2,546.45x = 3,817.31 × 987.47
4. Step 4: Simplify right side
   2,546.45x = 3,769,487.41
5. Step 5: Solve for x
   x = 3,769,487.41/2,546.45
6. Step 6: Final answer
   x = 1,480.29