Finding the Fourth Proportional to 8,618.86, 12,933.45 and 3,688.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,618.86 : 12,933.45 = 3,688.50 : x
2. Step 2: Convert to fraction form
   8,618.86/12,933.45 = 3,688.50/x
3. Step 3: Cross multiply
   8,618.86x = 12,933.45 × 3,688.50
4. Step 4: Simplify right side
   8,618.86x = 47,705,046.49
5. Step 5: Solve for x
   x = 47,705,046.49/8,618.86
6. Step 6: Final answer
   x = 5,534.96