Finding the Fourth Proportional to 76,636.06, 105,757.84 and 42,647.64

Step by Step Solution

1. Step 1: Write the proportion equation
   76,636.06 : 105,757.84 = 42,647.64 : x
2. Step 2: Convert to fraction form
   76,636.06/105,757.84 = 42,647.64/x
3. Step 3: Cross multiply
   76,636.06x = 105,757.84 × 42,647.64
4. Step 4: Simplify right side
   76,636.06x = 4,510,322,287.50
5. Step 5: Solve for x
   x = 4,510,322,287.50/76,636.06
6. Step 6: Final answer
   x = 58,853.79