Finding the Fourth Proportional to 12,174.18, 18,269.25 and 4,276.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,174.18 : 18,269.25 = 4,276.50 : x
2. Step 2: Convert to fraction form
   12,174.18/18,269.25 = 4,276.50/x
3. Step 3: Cross multiply
   12,174.18x = 18,269.25 × 4,276.50
4. Step 4: Simplify right side
   12,174.18x = 78,128,447.63
5. Step 5: Solve for x
   x = 78,128,447.63/12,174.18
6. Step 6: Final answer
   x = 6,417.55