Finding the Fourth Proportional to 8,867.72, 12,238.08 and 5,091.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,867.72 : 12,238.08 = 5,091.50 : x
2. Step 2: Convert to fraction form
   8,867.72/12,238.08 = 5,091.50/x
3. Step 3: Cross multiply
   8,867.72x = 12,238.08 × 5,091.50
4. Step 4: Simplify right side
   8,867.72x = 62,310,184.32
5. Step 5: Solve for x
   x = 62,310,184.32/8,867.72
6. Step 6: Final answer
   x = 7,026.63