Finding the Fourth Proportional to 1,071.69, 1,603.88 and 933.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,071.69 : 1,603.88 = 933.99 : x
2. Step 2: Convert to fraction form
   1,071.69/1,603.88 = 933.99/x
3. Step 3: Cross multiply
   1,071.69x = 1,603.88 × 933.99
4. Step 4: Simplify right side
   1,071.69x = 1,498,007.88
5. Step 5: Solve for x
   x = 1,498,007.88/1,071.69
6. Step 6: Final answer
   x = 1,397.80