Finding the Fourth Proportional to 223,480.23, 335,219.49 and 90,358.89

Step by Step Solution

1. Step 1: Write the proportion equation
   223,480.23 : 335,219.49 = 90,358.89 : x
2. Step 2: Convert to fraction form
   223,480.23/335,219.49 = 90,358.89/x
3. Step 3: Cross multiply
   223,480.23x = 335,219.49 × 90,358.89
4. Step 4: Simplify right side
   223,480.23x = 30,290,061,022.77
5. Step 5: Solve for x
   x = 30,290,061,022.77/223,480.23
6. Step 6: Final answer
   x = 135,537.99