Finding the Fourth Proportional to 7,045.78, 9,722.82 and 3,902.18

Step by Step Solution

1. Step 1: Write the proportion equation
   7,045.78 : 9,722.82 = 3,902.18 : x
2. Step 2: Convert to fraction form
   7,045.78/9,722.82 = 3,902.18/x
3. Step 3: Cross multiply
   7,045.78x = 9,722.82 × 3,902.18
4. Step 4: Simplify right side
   7,045.78x = 37,940,193.75
5. Step 5: Solve for x
   x = 37,940,193.75/7,045.78
6. Step 6: Final answer
   x = 5,384.81