Finding the Fourth Proportional to 2,547.38, 3,821.38 and 987.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,547.38 : 3,821.38 = 987.05 : x
2. Step 2: Convert to fraction form
   2,547.38/3,821.38 = 987.05/x
3. Step 3: Cross multiply
   2,547.38x = 3,821.38 × 987.05
4. Step 4: Simplify right side
   2,547.38x = 3,771,900.21
5. Step 5: Solve for x
   x = 3,771,900.21/2,547.38
6. Step 6: Final answer
   x = 1,480.70