Finding the Fourth Proportional to 1,981.79, 2,735.15 and 1,142.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,981.79 : 2,735.15 = 1,142.63 : x
2. Step 2: Convert to fraction form
   1,981.79/2,735.15 = 1,142.63/x
3. Step 3: Cross multiply
   1,981.79x = 2,735.15 × 1,142.63
4. Step 4: Simplify right side
   1,981.79x = 3,125,264.44
5. Step 5: Solve for x
   x = 3,125,264.44/1,981.79
6. Step 6: Final answer
   x = 1,576.99