Finding the Fourth Proportional to 6,900.31, 9,522.15 and 3,916.09

Step by Step Solution

1. Step 1: Write the proportion equation
   6,900.31 : 9,522.15 = 3,916.09 : x
2. Step 2: Convert to fraction form
   6,900.31/9,522.15 = 3,916.09/x
3. Step 3: Cross multiply
   6,900.31x = 9,522.15 × 3,916.09
4. Step 4: Simplify right side
   6,900.31x = 37,289,593.61
5. Step 5: Solve for x
   x = 37,289,593.61/6,900.31
6. Step 6: Final answer
   x = 5,404.05