Finding the Fourth Proportional to 76,777.07, 105,952.25 and 42,785.31

Step by Step Solution

1. Step 1: Write the proportion equation
   76,777.07 : 105,952.25 = 42,785.31 : x
2. Step 2: Convert to fraction form
   76,777.07/105,952.25 = 42,785.31/x
3. Step 3: Cross multiply
   76,777.07x = 105,952.25 × 42,785.31
4. Step 4: Simplify right side
   76,777.07x = 4,533,200,365.73
5. Step 5: Solve for x
   x = 4,533,200,365.73/76,777.07
6. Step 6: Final answer
   x = 59,043.68