Finding the Fourth Proportional to 76,744.81, 105,903.70 and 42,288.46

Step by Step Solution

1. Step 1: Write the proportion equation
   76,744.81 : 105,903.70 = 42,288.46 : x
2. Step 2: Convert to fraction form
   76,744.81/105,903.70 = 42,288.46/x
3. Step 3: Cross multiply
   76,744.81x = 105,903.70 × 42,288.46
4. Step 4: Simplify right side
   76,744.81x = 4,478,504,381.30
5. Step 5: Solve for x
   x = 4,478,504,381.30/76,744.81
6. Step 6: Final answer
   x = 58,355.79