Finding the Fourth Proportional to 1,068.95, 1,603.59 and 338.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,068.95 : 1,603.59 = 338.47 : x
2. Step 2: Convert to fraction form
   1,068.95/1,603.59 = 338.47/x
3. Step 3: Cross multiply
   1,068.95x = 1,603.59 × 338.47
4. Step 4: Simplify right side
   1,068.95x = 542,763.10
5. Step 5: Solve for x
   x = 542,763.10/1,068.95
6. Step 6: Final answer
   x = 507.75