Finding the Fourth Proportional to 76,777.81, 105,949.08 and 42,321.42

Step by Step Solution

1. Step 1: Write the proportion equation
   76,777.81 : 105,949.08 = 42,321.42 : x
2. Step 2: Convert to fraction form
   76,777.81/105,949.08 = 42,321.42/x
3. Step 3: Cross multiply
   76,777.81x = 105,949.08 × 42,321.42
4. Step 4: Simplify right side
   76,777.81x = 4,483,915,513.29
5. Step 5: Solve for x
   x = 4,483,915,513.29/76,777.81
6. Step 6: Final answer
   x = 58,401.19