Finding the Fourth Proportional to 8,900.08, 12,281.81 and 5,122.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,900.08 : 12,281.81 = 5,122.72 : x
2. Step 2: Convert to fraction form
   8,900.08/12,281.81 = 5,122.72/x
3. Step 3: Cross multiply
   8,900.08x = 12,281.81 × 5,122.72
4. Step 4: Simplify right side
   8,900.08x = 62,916,273.72
5. Step 5: Solve for x
   x = 62,916,273.72/8,900.08
6. Step 6: Final answer
   x = 7,069.18