Finding the Fourth Proportional to 105,984.51, 146,216.72 and 68,280.75

Step by Step Solution

1. Step 1: Write the proportion equation
   105,984.51 : 146,216.72 = 68,280.75 : x
2. Step 2: Convert to fraction form
   105,984.51/146,216.72 = 68,280.75/x
3. Step 3: Cross multiply
   105,984.51x = 146,216.72 × 68,280.75
4. Step 4: Simplify right side
   105,984.51x = 9,983,786,962.74
5. Step 5: Solve for x
   x = 9,983,786,962.74/105,984.51
6. Step 6: Final answer
   x = 94,200.44