Finding the Fourth Proportional to 86,865.42, 119,874.72 and 49,138.86

Step by Step Solution

1. Step 1: Write the proportion equation
   86,865.42 : 119,874.72 = 49,138.86 : x
2. Step 2: Convert to fraction form
   86,865.42/119,874.72 = 49,138.86/x
3. Step 3: Cross multiply
   86,865.42x = 119,874.72 × 49,138.86
4. Step 4: Simplify right side
   86,865.42x = 5,890,507,083.62
5. Step 5: Solve for x
   x = 5,890,507,083.62/86,865.42
6. Step 6: Final answer
   x = 67,811.88