Finding the Fourth Proportional to 7,087.98, 9,788.67 and 5,316.78

Step by Step Solution

1. Step 1: Write the proportion equation
   7,087.98 : 9,788.67 = 5,316.78 : x
2. Step 2: Convert to fraction form
   7,087.98/9,788.67 = 5,316.78/x
3. Step 3: Cross multiply
   7,087.98x = 9,788.67 × 5,316.78
4. Step 4: Simplify right side
   7,087.98x = 52,044,204.88
5. Step 5: Solve for x
   x = 52,044,204.88/7,087.98
6. Step 6: Final answer
   x = 7,342.60