Finding the Fourth Proportional to 2,077.72, 2,868.70 and 1,292.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,077.72 : 2,868.70 = 1,292.12 : x
2. Step 2: Convert to fraction form
   2,077.72/2,868.70 = 1,292.12/x
3. Step 3: Cross multiply
   2,077.72x = 2,868.70 × 1,292.12
4. Step 4: Simplify right side
   2,077.72x = 3,706,704.64
5. Step 5: Solve for x
   x = 3,706,704.64/2,077.72
6. Step 6: Final answer
   x = 1,784.03