Finding the Fourth Proportional to 1,605.06, 2,215.22 and 942.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,605.06 : 2,215.22 = 942.28 : x
2. Step 2: Convert to fraction form
   1,605.06/2,215.22 = 942.28/x
3. Step 3: Cross multiply
   1,605.06x = 2,215.22 × 942.28
4. Step 4: Simplify right side
   1,605.06x = 2,087,359.86
5. Step 5: Solve for x
   x = 2,087,359.86/1,605.06
6. Step 6: Final answer
   x = 1,300.49