Finding the Fourth Proportional to 2,075.32, 2,865.27 and 1,290.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,075.32 : 2,865.27 = 1,290.43 : x
2. Step 2: Convert to fraction form
   2,075.32/2,865.27 = 1,290.43/x
3. Step 3: Cross multiply
   2,075.32x = 2,865.27 × 1,290.43
4. Step 4: Simplify right side
   2,075.32x = 3,697,430.37
5. Step 5: Solve for x
   x = 3,697,430.37/2,075.32
6. Step 6: Final answer
   x = 1,781.62