Finding the Fourth Proportional to 2,227.79, 3,075.78 and 1,431.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,227.79 : 3,075.78 = 1,431.45 : x
2. Step 2: Convert to fraction form
   2,227.79/3,075.78 = 1,431.45/x
3. Step 3: Cross multiply
   2,227.79x = 3,075.78 × 1,431.45
4. Step 4: Simplify right side
   2,227.79x = 4,402,825.28
5. Step 5: Solve for x
   x = 4,402,825.28/2,227.79
6. Step 6: Final answer
   x = 1,976.32