Finding the Fourth Proportional to 1,603.34, 2,404.52 and 678.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,603.34 : 2,404.52 = 678.87 : x
2. Step 2: Convert to fraction form
   1,603.34/2,404.52 = 678.87/x
3. Step 3: Cross multiply
   1,603.34x = 2,404.52 × 678.87
4. Step 4: Simplify right side
   1,603.34x = 1,632,356.49
5. Step 5: Solve for x
   x = 1,632,356.49/1,603.34
6. Step 6: Final answer
   x = 1,018.10