Finding the Fourth Proportional to 2,075.50, 3,113.67 and 921.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,075.50 : 3,113.67 = 921.25 : x
2. Step 2: Convert to fraction form
   2,075.50/3,113.67 = 921.25/x
3. Step 3: Cross multiply
   2,075.50x = 3,113.67 × 921.25
4. Step 4: Simplify right side
   2,075.50x = 2,868,468.49
5. Step 5: Solve for x
   x = 2,868,468.49/2,075.50
6. Step 6: Final answer
   x = 1,382.06