Finding the Fourth Proportional to 5,722.82, 7,892.36 and 3,929.48

Step by Step Solution

1. Step 1: Write the proportion equation
   5,722.82 : 7,892.36 = 3,929.48 : x
2. Step 2: Convert to fraction form
   5,722.82/7,892.36 = 3,929.48/x
3. Step 3: Cross multiply
   5,722.82x = 7,892.36 × 3,929.48
4. Step 4: Simplify right side
   5,722.82x = 31,012,870.77
5. Step 5: Solve for x
   x = 31,012,870.77/5,722.82
6. Step 6: Final answer
   x = 5,419.16