Finding the Fourth Proportional to 7,870.17, 10,867.41 and 5,229.36

Step by Step Solution

1. Step 1: Write the proportion equation
   7,870.17 : 10,867.41 = 5,229.36 : x
2. Step 2: Convert to fraction form
   7,870.17/10,867.41 = 5,229.36/x
3. Step 3: Cross multiply
   7,870.17x = 10,867.41 × 5,229.36
4. Step 4: Simplify right side
   7,870.17x = 56,829,599.16
5. Step 5: Solve for x
   x = 56,829,599.16/7,870.17
6. Step 6: Final answer
   x = 7,220.89