Finding the Fourth Proportional to 1,663.36, 2,496.59 and 842.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,663.36 : 2,496.59 = 842.22 : x
2. Step 2: Convert to fraction form
   1,663.36/2,496.59 = 842.22/x
3. Step 3: Cross multiply
   1,663.36x = 2,496.59 × 842.22
4. Step 4: Simplify right side
   1,663.36x = 2,102,667.61
5. Step 5: Solve for x
   x = 2,102,667.61/1,663.36
6. Step 6: Final answer
   x = 1,264.11