Finding the Fourth Proportional to 31,450.56, 47,178.89 and 11,724.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,450.56 : 47,178.89 = 11,724.50 : x
2. Step 2: Convert to fraction form
   31,450.56/47,178.89 = 11,724.50/x
3. Step 3: Cross multiply
   31,450.56x = 47,178.89 × 11,724.50
4. Step 4: Simplify right side
   31,450.56x = 553,148,601.29
5. Step 5: Solve for x
   x = 553,148,601.29/31,450.56
6. Step 6: Final answer
   x = 17,587.88