Finding the Fourth Proportional to 76,754.45, 105,928.90 and 42,768.47

Step by Step Solution

1. Step 1: Write the proportion equation
   76,754.45 : 105,928.90 = 42,768.47 : x
2. Step 2: Convert to fraction form
   76,754.45/105,928.90 = 42,768.47/x
3. Step 3: Cross multiply
   76,754.45x = 105,928.90 × 42,768.47
4. Step 4: Simplify right side
   76,754.45x = 4,530,417,139.68
5. Step 5: Solve for x
   x = 4,530,417,139.68/76,754.45
6. Step 6: Final answer
   x = 59,024.81