Finding the Fourth Proportional to 81,768,981.72, 122,708,016.82 and 42,413,506.66

Step by Step Solution

1. Step 1: Write the proportion equation
   81,768,981.72 : 122,708,016.82 = 42,413,506.66 : x
2. Step 2: Convert to fraction form
   81,768,981.72/122,708,016.82 = 42,413,506.66/x
3. Step 3: Cross multiply
   81,768,981.72x = 122,708,016.82 × 42,413,506.66
4. Step 4: Simplify right side
   81,768,981.72x = 5,204,477,288,630,461
5. Step 5: Solve for x
   x = 5,204,477,288,630,461/81,768,981.72
6. Step 6: Final answer
   x = 63,648,552.04