Finding the Fourth Proportional to 1,650.89, 2,278.17 and 987.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,650.89 : 2,278.17 = 987.35 : x
2. Step 2: Convert to fraction form
   1,650.89/2,278.17 = 987.35/x
3. Step 3: Cross multiply
   1,650.89x = 2,278.17 × 987.35
4. Step 4: Simplify right side
   1,650.89x = 2,249,351.15
5. Step 5: Solve for x
   x = 2,249,351.15/1,650.89
6. Step 6: Final answer
   x = 1,362.51