Finding the Fourth Proportional to 72,978.69, 100,710.61 and 41,147.60

Step by Step Solution

1. Step 1: Write the proportion equation
   72,978.69 : 100,710.61 = 41,147.60 : x
2. Step 2: Convert to fraction form
   72,978.69/100,710.61 = 41,147.60/x
3. Step 3: Cross multiply
   72,978.69x = 100,710.61 × 41,147.60
4. Step 4: Simplify right side
   72,978.69x = 4,143,999,289.61
5. Step 5: Solve for x
   x = 4,143,999,289.61/72,978.69
6. Step 6: Final answer
   x = 56,783.69