Finding the Fourth Proportional to 12,379.50, 18,569.34 and 4,171.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,379.50 : 18,569.34 = 4,171.50 : x
2. Step 2: Convert to fraction form
   12,379.50/18,569.34 = 4,171.50/x
3. Step 3: Cross multiply
   12,379.50x = 18,569.34 × 4,171.50
4. Step 4: Simplify right side
   12,379.50x = 77,462,001.81
5. Step 5: Solve for x
   x = 77,462,001.81/12,379.50
6. Step 6: Final answer
   x = 6,257.28