Finding the Fourth Proportional to 76,657.28, 105,786.25 and 42,665.27

Step by Step Solution

1. Step 1: Write the proportion equation
   76,657.28 : 105,786.25 = 42,665.27 : x
2. Step 2: Convert to fraction form
   76,657.28/105,786.25 = 42,665.27/x
3. Step 3: Cross multiply
   76,657.28x = 105,786.25 × 42,665.27
4. Step 4: Simplify right side
   76,657.28x = 4,513,398,282.94
5. Step 5: Solve for x
   x = 4,513,398,282.94/76,657.28
6. Step 6: Final answer
   x = 58,877.62