Finding the Fourth Proportional to 6,886.98, 9,504.32 and 3,902.78

Step by Step Solution

1. Step 1: Write the proportion equation
   6,886.98 : 9,504.32 = 3,902.78 : x
2. Step 2: Convert to fraction form
   6,886.98/9,504.32 = 3,902.78/x
3. Step 3: Cross multiply
   6,886.98x = 9,504.32 × 3,902.78
4. Step 4: Simplify right side
   6,886.98x = 37,093,274.26
5. Step 5: Solve for x
   x = 37,093,274.26/6,886.98
6. Step 6: Final answer
   x = 5,386.00