Finding the Fourth Proportional to 5,135.29, 7,086.69 and 2,897.15

Step by Step Solution

1. Step 1: Write the proportion equation
   5,135.29 : 7,086.69 = 2,897.15 : x
2. Step 2: Convert to fraction form
   5,135.29/7,086.69 = 2,897.15/x
3. Step 3: Cross multiply
   5,135.29x = 7,086.69 × 2,897.15
4. Step 4: Simplify right side
   5,135.29x = 20,531,168.50
5. Step 5: Solve for x
   x = 20,531,168.50/5,135.29
6. Step 6: Final answer
   x = 3,998.06