Finding the Fourth Proportional to 47,616.64, 71,429.76 and 12,558.72

Step by Step Solution

1. Step 1: Write the proportion equation
   47,616.64 : 71,429.76 = 12,558.72 : x
2. Step 2: Convert to fraction form
   47,616.64/71,429.76 = 12,558.72/x
3. Step 3: Cross multiply
   47,616.64x = 71,429.76 × 12,558.72
4. Step 4: Simplify right side
   47,616.64x = 897,066,355.51
5. Step 5: Solve for x
   x = 897,066,355.51/47,616.64
6. Step 6: Final answer
   x = 18,839.35