Finding the Fourth Proportional to 8,988.81, 12,404.00 and 5,211.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,988.81 : 12,404.00 = 5,211.69 : x
2. Step 2: Convert to fraction form
   8,988.81/12,404.00 = 5,211.69/x
3. Step 3: Cross multiply
   8,988.81x = 12,404.00 × 5,211.69
4. Step 4: Simplify right side
   8,988.81x = 64,645,776.70
5. Step 5: Solve for x
   x = 64,645,776.70/8,988.81
6. Step 6: Final answer
   x = 7,191.81