Finding the Fourth Proportional to 5,401.69, 8,089.94 and 5,214.61

Step by Step Solution

1. Step 1: Write the proportion equation
   5,401.69 : 8,089.94 = 5,214.61 : x
2. Step 2: Convert to fraction form
   5,401.69/8,089.94 = 5,214.61/x
3. Step 3: Cross multiply
   5,401.69x = 8,089.94 × 5,214.61
4. Step 4: Simplify right side
   5,401.69x = 42,185,848.76
5. Step 5: Solve for x
   x = 42,185,848.76/5,401.69
6. Step 6: Final answer
   x = 7,809.76