Finding the Fourth Proportional to 158,608.78, 218,859.94 and 90,630.15

Step by Step Solution

1. Step 1: Write the proportion equation
   158,608.78 : 218,859.94 = 90,630.15 : x
2. Step 2: Convert to fraction form
   158,608.78/218,859.94 = 90,630.15/x
3. Step 3: Cross multiply
   158,608.78x = 218,859.94 × 90,630.15
4. Step 4: Simplify right side
   158,608.78x = 19,835,309,191.19
5. Step 5: Solve for x
   x = 19,835,309,191.19/158,608.78
6. Step 6: Final answer
   x = 125,058.08