Finding the Fourth Proportional to 6,910.89, 9,531.88 and 5,415.83

Step by Step Solution

1. Step 1: Write the proportion equation
   6,910.89 : 9,531.88 = 5,415.83 : x
2. Step 2: Convert to fraction form
   6,910.89/9,531.88 = 5,415.83/x
3. Step 3: Cross multiply
   6,910.89x = 9,531.88 × 5,415.83
4. Step 4: Simplify right side
   6,910.89x = 51,623,016.21
5. Step 5: Solve for x
   x = 51,623,016.21/6,910.89
6. Step 6: Final answer
   x = 7,469.81