Finding the Fourth Proportional to 2,070.72, 3,107.16 and 839.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,070.72 : 3,107.16 = 839.04 : x
2. Step 2: Convert to fraction form
   2,070.72/3,107.16 = 839.04/x
3. Step 3: Cross multiply
   2,070.72x = 3,107.16 × 839.04
4. Step 4: Simplify right side
   2,070.72x = 2,607,031.53
5. Step 5: Solve for x
   x = 2,607,031.53/2,070.72
6. Step 6: Final answer
   x = 1,259.00