Finding the Fourth Proportional to 76,811.35, 105,991.10 and 42,817.27

Step by Step Solution

1. Step 1: Write the proportion equation
   76,811.35 : 105,991.10 = 42,817.27 : x
2. Step 2: Convert to fraction form
   76,811.35/105,991.10 = 42,817.27/x
3. Step 3: Cross multiply
   76,811.35x = 105,991.10 × 42,817.27
4. Step 4: Simplify right side
   76,811.35x = 4,538,249,546.30
5. Step 5: Solve for x
   x = 4,538,249,546.30/76,811.35
6. Step 6: Final answer
   x = 59,083.06