Finding the Fourth Proportional to 72,572.38, 100,154.81 and 54,638.98

Step by Step Solution

1. Step 1: Write the proportion equation
   72,572.38 : 100,154.81 = 54,638.98 : x
2. Step 2: Convert to fraction form
   72,572.38/100,154.81 = 54,638.98/x
3. Step 3: Cross multiply
   72,572.38x = 100,154.81 × 54,638.98
4. Step 4: Simplify right side
   72,572.38x = 5,472,356,717.39
5. Step 5: Solve for x
   x = 5,472,356,717.39/72,572.38
6. Step 6: Final answer
   x = 75,405.50