Finding the Fourth Proportional to 1,610.86, 2,223.27 and 938.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,610.86 : 2,223.27 = 938.56 : x
2. Step 2: Convert to fraction form
   1,610.86/2,223.27 = 938.56/x
3. Step 3: Cross multiply
   1,610.86x = 2,223.27 × 938.56
4. Step 4: Simplify right side
   1,610.86x = 2,086,672.29
5. Step 5: Solve for x
   x = 2,086,672.29/1,610.86
6. Step 6: Final answer
   x = 1,295.38