Finding the Fourth Proportional to 98,728.56, 136,248.56 and 54,016.56

Step by Step Solution

1. Step 1: Write the proportion equation
   98,728.56 : 136,248.56 = 54,016.56 : x
2. Step 2: Convert to fraction form
   98,728.56/136,248.56 = 54,016.56/x
3. Step 3: Cross multiply
   98,728.56x = 136,248.56 × 54,016.56
4. Step 4: Simplify right side
   98,728.56x = 7,359,678,516.15
5. Step 5: Solve for x
   x = 7,359,678,516.15/98,728.56
6. Step 6: Final answer
   x = 74,544.57