Finding the Fourth Proportional to 1,075.71, 1,485.50 and 698.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,075.71 : 1,485.50 = 698.25 : x
2. Step 2: Convert to fraction form
   1,075.71/1,485.50 = 698.25/x
3. Step 3: Cross multiply
   1,075.71x = 1,485.50 × 698.25
4. Step 4: Simplify right side
   1,075.71x = 1,037,252.45
5. Step 5: Solve for x
   x = 1,037,252.45/1,075.71
6. Step 6: Final answer
   x = 964.25