Finding the Fourth Proportional to 2,675.31, 4,010.15 and 919.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,675.31 : 4,010.15 = 919.77 : x
2. Step 2: Convert to fraction form
   2,675.31/4,010.15 = 919.77/x
3. Step 3: Cross multiply
   2,675.31x = 4,010.15 × 919.77
4. Step 4: Simplify right side
   2,675.31x = 3,688,411.07
5. Step 5: Solve for x
   x = 3,688,411.07/2,675.31
6. Step 6: Final answer
   x = 1,378.69