Finding the Fourth Proportional to 1,605.30, 2,215.10 and 942.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,605.30 : 2,215.10 = 942.02 : x
2. Step 2: Convert to fraction form
   1,605.30/2,215.10 = 942.02/x
3. Step 3: Cross multiply
   1,605.30x = 2,215.10 × 942.02
4. Step 4: Simplify right side
   1,605.30x = 2,086,668.50
5. Step 5: Solve for x
   x = 2,086,668.50/1,605.30
6. Step 6: Final answer
   x = 1,299.86