Finding the Fourth Proportional to 1,605.92, 2,216.04 and 942.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,605.92 : 2,216.04 = 942.80 : x
2. Step 2: Convert to fraction form
   1,605.92/2,216.04 = 942.80/x
3. Step 3: Cross multiply
   1,605.92x = 2,216.04 × 942.80
4. Step 4: Simplify right side
   1,605.92x = 2,089,282.51
5. Step 5: Solve for x
   x = 2,089,282.51/1,605.92
6. Step 6: Final answer
   x = 1,300.99