Finding the Fourth Proportional to 3,802.79, 5,707.78 and 1,955.21

Step by Step Solution

1. Step 1: Write the proportion equation
   3,802.79 : 5,707.78 = 1,955.21 : x
2. Step 2: Convert to fraction form
   3,802.79/5,707.78 = 1,955.21/x
3. Step 3: Cross multiply
   3,802.79x = 5,707.78 × 1,955.21
4. Step 4: Simplify right side
   3,802.79x = 11,159,870.22
5. Step 5: Solve for x
   x = 11,159,870.22/3,802.79
6. Step 6: Final answer
   x = 2,934.65