Finding the Fourth Proportional to 158,085.27, 218,150.01 and 90,105.21

Step by Step Solution

1. Step 1: Write the proportion equation
   158,085.27 : 218,150.01 = 90,105.21 : x
2. Step 2: Convert to fraction form
   158,085.27/218,150.01 = 90,105.21/x
3. Step 3: Cross multiply
   158,085.27x = 218,150.01 × 90,105.21
4. Step 4: Simplify right side
   158,085.27x = 19,656,452,462.55
5. Step 5: Solve for x
   x = 19,656,452,462.55/158,085.27
6. Step 6: Final answer
   x = 124,340.82