Finding the Fourth Proportional to 1,611.38, 2,223.32 and 938.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,611.38 : 2,223.32 = 938.77 : x
2. Step 2: Convert to fraction form
   1,611.38/2,223.32 = 938.77/x
3. Step 3: Cross multiply
   1,611.38x = 2,223.32 × 938.77
4. Step 4: Simplify right side
   1,611.38x = 2,087,188.37
5. Step 5: Solve for x
   x = 2,087,188.37/1,611.38
6. Step 6: Final answer
   x = 1,295.28