Finding the Fourth Proportional to 1,605.49, 2,215.59 and 942.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,605.49 : 2,215.59 = 942.35 : x
2. Step 2: Convert to fraction form
   1,605.49/2,215.59 = 942.35/x
3. Step 3: Cross multiply
   1,605.49x = 2,215.59 × 942.35
4. Step 4: Simplify right side
   1,605.49x = 2,087,861.24
5. Step 5: Solve for x
   x = 2,087,861.24/1,605.49
6. Step 6: Final answer
   x = 1,300.45