Finding the Fourth Proportional to 7,839.17, 10,820.88 and 5,187.42

Step by Step Solution

1. Step 1: Write the proportion equation
   7,839.17 : 10,820.88 = 5,187.42 : x
2. Step 2: Convert to fraction form
   7,839.17/10,820.88 = 5,187.42/x
3. Step 3: Cross multiply
   7,839.17x = 10,820.88 × 5,187.42
4. Step 4: Simplify right side
   7,839.17x = 56,132,449.33
5. Step 5: Solve for x
   x = 56,132,449.33/7,839.17
6. Step 6: Final answer
   x = 7,160.51