Finding the Fourth Proportional to 76,636.77, 105,757.04 and 42,643.97

Step by Step Solution

1. Step 1: Write the proportion equation
   76,636.77 : 105,757.04 = 42,643.97 : x
2. Step 2: Convert to fraction form
   76,636.77/105,757.04 = 42,643.97/x
3. Step 3: Cross multiply
   76,636.77x = 105,757.04 × 42,643.97
4. Step 4: Simplify right side
   76,636.77x = 4,509,900,015.46
5. Step 5: Solve for x
   x = 4,509,900,015.46/76,636.77
6. Step 6: Final answer
   x = 58,847.73