Finding the Fourth Proportional to 76,835.05, 105,972.30 and 49,986.18

Step by Step Solution

1. Step 1: Write the proportion equation
   76,835.05 : 105,972.30 = 49,986.18 : x
2. Step 2: Convert to fraction form
   76,835.05/105,972.30 = 49,986.18/x
3. Step 3: Cross multiply
   76,835.05x = 105,972.30 × 49,986.18
4. Step 4: Simplify right side
   76,835.05x = 5,297,150,462.81
5. Step 5: Solve for x
   x = 5,297,150,462.81/76,835.05
6. Step 6: Final answer
   x = 68,941.85