Finding the Fourth Proportional to 76,749.43, 105,917.48 and 42,757.89

Step by Step Solution

1. Step 1: Write the proportion equation
   76,749.43 : 105,917.48 = 42,757.89 : x
2. Step 2: Convert to fraction form
   76,749.43/105,917.48 = 42,757.89/x
3. Step 3: Cross multiply
   76,749.43x = 105,917.48 × 42,757.89
4. Step 4: Simplify right side
   76,749.43x = 4,528,808,009.92
5. Step 5: Solve for x
   x = 4,528,808,009.92/76,749.43
6. Step 6: Final answer
   x = 59,007.71