Finding the Fourth Proportional to 1,981.62, 2,972.06 and 885.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,981.62 : 2,972.06 = 885.78 : x
2. Step 2: Convert to fraction form
   1,981.62/2,972.06 = 885.78/x
3. Step 3: Cross multiply
   1,981.62x = 2,972.06 × 885.78
4. Step 4: Simplify right side
   1,981.62x = 2,632,591.31
5. Step 5: Solve for x
   x = 2,632,591.31/1,981.62
6. Step 6: Final answer
   x = 1,328.50