Finding the Fourth Proportional to 942.05, 1,300.69 and 842.17

Step by Step Solution

1. Step 1: Write the proportion equation
   942.05 : 1,300.69 = 842.17 : x
2. Step 2: Convert to fraction form
   942.05/1,300.69 = 842.17/x
3. Step 3: Cross multiply
   942.05x = 1,300.69 × 842.17
4. Step 4: Simplify right side
   942.05x = 1,095,396.74
5. Step 5: Solve for x
   x = 1,095,396.74/942.05
6. Step 6: Final answer
   x = 1,162.78