Finding the Fourth Proportional to 6,885.98, 10,390.52 and 6,885.98

Step by Step Solution

1. Step 1: Write the proportion equation
   6,885.98 : 10,390.52 = 6,885.98 : x
2. Step 2: Convert to fraction form
   6,885.98/10,390.52 = 6,885.98/x
3. Step 3: Cross multiply
   6,885.98x = 10,390.52 × 6,885.98
4. Step 4: Simplify right side
   6,885.98x = 71,548,878.48
5. Step 5: Solve for x
   x = 71,548,878.48/6,885.98
6. Step 6: Final answer
   x = 10,390.52