Finding the Fourth Proportional to 8,988.06, 12,404.45 and 5,404.19

Step by Step Solution

1. Step 1: Write the proportion equation
   8,988.06 : 12,404.45 = 5,404.19 : x
2. Step 2: Convert to fraction form
   8,988.06/12,404.45 = 5,404.19/x
3. Step 3: Cross multiply
   8,988.06x = 12,404.45 × 5,404.19
4. Step 4: Simplify right side
   8,988.06x = 67,036,004.65
5. Step 5: Solve for x
   x = 67,036,004.65/8,988.06
6. Step 6: Final answer
   x = 7,458.34