Finding the Fourth Proportional to 76,608.20, 105,632.15 and 53,939.94

Step by Step Solution

1. Step 1: Write the proportion equation
   76,608.20 : 105,632.15 = 53,939.94 : x
2. Step 2: Convert to fraction form
   76,608.20/105,632.15 = 53,939.94/x
3. Step 3: Cross multiply
   76,608.20x = 105,632.15 × 53,939.94
4. Step 4: Simplify right side
   76,608.20x = 5,697,791,563.37
5. Step 5: Solve for x
   x = 5,697,791,563.37/76,608.20
6. Step 6: Final answer
   x = 74,375.74