Finding the Fourth Proportional to 12,469.77, 18,704.58 and 3,109.74

Step by Step Solution

1. Step 1: Write the proportion equation
   12,469.77 : 18,704.58 = 3,109.74 : x
2. Step 2: Convert to fraction form
   12,469.77/18,704.58 = 3,109.74/x
3. Step 3: Cross multiply
   12,469.77x = 18,704.58 × 3,109.74
4. Step 4: Simplify right side
   12,469.77x = 58,166,380.61
5. Step 5: Solve for x
   x = 58,166,380.61/12,469.77
6. Step 6: Final answer
   x = 4,664.59