Finding the Fourth Proportional to 2,100.60, 3,151.71 and 802.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.60 : 3,151.71 = 802.17 : x
2. Step 2: Convert to fraction form
   2,100.60/3,151.71 = 802.17/x
3. Step 3: Cross multiply
   2,100.60x = 3,151.71 × 802.17
4. Step 4: Simplify right side
   2,100.60x = 2,528,207.21
5. Step 5: Solve for x
   x = 2,528,207.21/2,100.60
6. Step 6: Final answer
   x = 1,203.56