Finding the Fourth Proportional to 49,392.56, 74,088.72 and 12,456.56

Step by Step Solution

1. Step 1: Write the proportion equation
   49,392.56 : 74,088.72 = 12,456.56 : x
2. Step 2: Convert to fraction form
   49,392.56/74,088.72 = 12,456.56/x
3. Step 3: Cross multiply
   49,392.56x = 74,088.72 × 12,456.56
4. Step 4: Simplify right side
   49,392.56x = 922,890,586.00
5. Step 5: Solve for x
   x = 922,890,586.00/49,392.56
6. Step 6: Final answer
   x = 18,684.81