Finding the Fourth Proportional to 6,900.14, 9,520.71 and 3,915.74

Step by Step Solution

1. Step 1: Write the proportion equation
   6,900.14 : 9,520.71 = 3,915.74 : x
2. Step 2: Convert to fraction form
   6,900.14/9,520.71 = 3,915.74/x
3. Step 3: Cross multiply
   6,900.14x = 9,520.71 × 3,915.74
4. Step 4: Simplify right side
   6,900.14x = 37,280,624.98
5. Step 5: Solve for x
   x = 37,280,624.98/6,900.14
6. Step 6: Final answer
   x = 5,402.88