Finding the Fourth Proportional to 2,061.77, 3,089.52 and 1,239.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,061.77 : 3,089.52 = 1,239.12 : x
2. Step 2: Convert to fraction form
   2,061.77/3,089.52 = 1,239.12/x
3. Step 3: Cross multiply
   2,061.77x = 3,089.52 × 1,239.12
4. Step 4: Simplify right side
   2,061.77x = 3,828,286.02
5. Step 5: Solve for x
   x = 3,828,286.02/2,061.77
6. Step 6: Final answer
   x = 1,856.80