Finding the Fourth Proportional to 72,012.48, 99,361.28 and 41,780.28

Step by Step Solution

1. Step 1: Write the proportion equation
   72,012.48 : 99,361.28 = 41,780.28 : x
2. Step 2: Convert to fraction form
   72,012.48/99,361.28 = 41,780.28/x
3. Step 3: Cross multiply
   72,012.48x = 99,361.28 × 41,780.28
4. Step 4: Simplify right side
   72,012.48x = 4,151,342,099.56
5. Step 5: Solve for x
   x = 4,151,342,099.56/72,012.48
6. Step 6: Final answer
   x = 57,647.54