Finding the Fourth Proportional to 76,759.34, 105,963.46 and 54,116.78

Step by Step Solution

1. Step 1: Write the proportion equation
   76,759.34 : 105,963.46 = 54,116.78 : x
2. Step 2: Convert to fraction form
   76,759.34/105,963.46 = 54,116.78/x
3. Step 3: Cross multiply
   76,759.34x = 105,963.46 × 54,116.78
4. Step 4: Simplify right side
   76,759.34x = 5,734,400,587.75
5. Step 5: Solve for x
   x = 5,734,400,587.75/76,759.34
6. Step 6: Final answer
   x = 74,706.23