Finding the Fourth Proportional to 7,867.86, 10,863.15 and 5,513.22

Step by Step Solution

1. Step 1: Write the proportion equation
   7,867.86 : 10,863.15 = 5,513.22 : x
2. Step 2: Convert to fraction form
   7,867.86/10,863.15 = 5,513.22/x
3. Step 3: Cross multiply
   7,867.86x = 10,863.15 × 5,513.22
4. Step 4: Simplify right side
   7,867.86x = 59,890,935.84
5. Step 5: Solve for x
   x = 59,890,935.84/7,867.86
6. Step 6: Final answer
   x = 7,612.10