Finding the Fourth Proportional to 1,384.52, 2,075.30 and 689.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.52 : 2,075.30 = 689.82 : x
2. Step 2: Convert to fraction form
   1,384.52/2,075.30 = 689.82/x
3. Step 3: Cross multiply
   1,384.52x = 2,075.30 × 689.82
4. Step 4: Simplify right side
   1,384.52x = 1,431,572.86
5. Step 5: Solve for x
   x = 1,431,572.86/1,384.52
6. Step 6: Final answer
   x = 1,033.99