Finding the Fourth Proportional to 76,978.45, 106,229.73 and 42,984.91

Step by Step Solution

1. Step 1: Write the proportion equation
   76,978.45 : 106,229.73 = 42,984.91 : x
2. Step 2: Convert to fraction form
   76,978.45/106,229.73 = 42,984.91/x
3. Step 3: Cross multiply
   76,978.45x = 106,229.73 × 42,984.91
4. Step 4: Simplify right side
   76,978.45x = 4,566,275,383.37
5. Step 5: Solve for x
   x = 4,566,275,383.37/76,978.45
6. Step 6: Final answer
   x = 59,318.88