Finding the Fourth Proportional to 1,071.67, 1,603.59 and 633.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,071.67 : 1,603.59 = 633.13 : x
2. Step 2: Convert to fraction form
   1,071.67/1,603.59 = 633.13/x
3. Step 3: Cross multiply
   1,071.67x = 1,603.59 × 633.13
4. Step 4: Simplify right side
   1,071.67x = 1,015,280.94
5. Step 5: Solve for x
   x = 1,015,280.94/1,071.67
6. Step 6: Final answer
   x = 947.38