Finding the Fourth Proportional to 1,871.31, 2,804.50 and 774.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,871.31 : 2,804.50 = 774.17 : x
2. Step 2: Convert to fraction form
   1,871.31/2,804.50 = 774.17/x
3. Step 3: Cross multiply
   1,871.31x = 2,804.50 × 774.17
4. Step 4: Simplify right side
   1,871.31x = 2,171,159.77
5. Step 5: Solve for x
   x = 2,171,159.77/1,871.31
6. Step 6: Final answer
   x = 1,160.24