Finding the Fourth Proportional to 1,068.99, 1,603.61 and 1,052.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,068.99 : 1,603.61 = 1,052.30 : x
2. Step 2: Convert to fraction form
   1,068.99/1,603.61 = 1,052.30/x
3. Step 3: Cross multiply
   1,068.99x = 1,603.61 × 1,052.30
4. Step 4: Simplify right side
   1,068.99x = 1,687,465.52
5. Step 5: Solve for x
   x = 1,687,465.52/1,068.99
6. Step 6: Final answer
   x = 1,578.56