Finding the Fourth Proportional to 1,870.49, 2,805.50 and 774.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.49 : 2,805.50 = 774.71 : x
2. Step 2: Convert to fraction form
   1,870.49/2,805.50 = 774.71/x
3. Step 3: Cross multiply
   1,870.49x = 2,805.50 × 774.71
4. Step 4: Simplify right side
   1,870.49x = 2,173,448.91
5. Step 5: Solve for x
   x = 2,173,448.91/1,870.49
6. Step 6: Final answer
   x = 1,161.97