Finding the Fourth Proportional to 247,878.57, 371,814.89 and 90,105.69

Step by Step Solution

1. Step 1: Write the proportion equation
   247,878.57 : 371,814.89 = 90,105.69 : x
2. Step 2: Convert to fraction form
   247,878.57/371,814.89 = 90,105.69/x
3. Step 3: Cross multiply
   247,878.57x = 371,814.89 × 90,105.69
4. Step 4: Simplify right side
   247,878.57x = 33,502,636,765.20
5. Step 5: Solve for x
   x = 33,502,636,765.20/247,878.57
6. Step 6: Final answer
   x = 135,157.46