Finding the Fourth Proportional to 404,587,494.72, 558,332,114.40 and 218,948,454.72

Step by Step Solution

1. Step 1: Write the proportion equation
   404,587,494.72 : 558,332,114.40 = 218,948,454.72 : x
2. Step 2: Convert to fraction form
   404,587,494.72/558,332,114.40 = 218,948,454.72/x
3. Step 3: Cross multiply
   404,587,494.72x = 558,332,114.40 × 218,948,454.72
4. Step 4: Simplify right side
   404,587,494.72x = 122,245,953,668,430,256
5. Step 5: Solve for x
   x = 122,245,953,668,430,256/404,587,494.72
6. Step 6: Final answer
   x = 302,149,609.82