Finding the Fourth Proportional to 1,446.74, 2,178.01 and 987.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,446.74 : 2,178.01 = 987.43 : x
2. Step 2: Convert to fraction form
   1,446.74/2,178.01 = 987.43/x
3. Step 3: Cross multiply
   1,446.74x = 2,178.01 × 987.43
4. Step 4: Simplify right side
   1,446.74x = 2,150,616.59
5. Step 5: Solve for x
   x = 2,150,616.59/1,446.74
6. Step 6: Final answer
   x = 1,486.53