Finding the Fourth Proportional to 86,890.55, 119,910.78 and 49,164.80

Step by Step Solution

1. Step 1: Write the proportion equation
   86,890.55 : 119,910.78 = 49,164.80 : x
2. Step 2: Convert to fraction form
   86,890.55/119,910.78 = 49,164.80/x
3. Step 3: Cross multiply
   86,890.55x = 119,910.78 × 49,164.80
4. Step 4: Simplify right side
   86,890.55x = 5,895,388,671.17
5. Step 5: Solve for x
   x = 5,895,388,671.17/86,890.55
6. Step 6: Final answer
   x = 67,848.45