Finding the Fourth Proportional to 1,610.06, 2,221.67 and 938.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,610.06 : 2,221.67 = 938.05 : x
2. Step 2: Convert to fraction form
   1,610.06/2,221.67 = 938.05/x
3. Step 3: Cross multiply
   1,610.06x = 2,221.67 × 938.05
4. Step 4: Simplify right side
   1,610.06x = 2,084,034.33
5. Step 5: Solve for x
   x = 2,084,034.33/1,610.06
6. Step 6: Final answer
   x = 1,294.39