Finding the Fourth Proportional to 2,102.08, 3,151.92 and 802.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,102.08 : 3,151.92 = 802.72 : x
2. Step 2: Convert to fraction form
   2,102.08/3,151.92 = 802.72/x
3. Step 3: Cross multiply
   2,102.08x = 3,151.92 × 802.72
4. Step 4: Simplify right side
   2,102.08x = 2,530,109.22
5. Step 5: Solve for x
   x = 2,530,109.22/2,102.08
6. Step 6: Final answer
   x = 1,203.62