Finding the Fourth Proportional to 76,530.81, 105,629.23 and 42,550.91

Step by Step Solution

1. Step 1: Write the proportion equation
   76,530.81 : 105,629.23 = 42,550.91 : x
2. Step 2: Convert to fraction form
   76,530.81/105,629.23 = 42,550.91/x
3. Step 3: Cross multiply
   76,530.81x = 105,629.23 × 42,550.91
4. Step 4: Simplify right side
   76,530.81x = 4,494,619,859.10
5. Step 5: Solve for x
   x = 4,494,619,859.10/76,530.81
6. Step 6: Final answer
   x = 58,729.55