Finding the Fourth Proportional to 8,815.98, 13,210.29 and 5,109.01

Step by Step Solution

1. Step 1: Write the proportion equation
   8,815.98 : 13,210.29 = 5,109.01 : x
2. Step 2: Convert to fraction form
   8,815.98/13,210.29 = 5,109.01/x
3. Step 3: Cross multiply
   8,815.98x = 13,210.29 × 5,109.01
4. Step 4: Simplify right side
   8,815.98x = 67,491,503.71
5. Step 5: Solve for x
   x = 67,491,503.71/8,815.98
6. Step 6: Final answer
   x = 7,655.59