Finding the Fourth Proportional to 81,768,978.86, 122,708,012.52 and 42,413,503.78

Step by Step Solution

1. Step 1: Write the proportion equation
   81,768,978.86 : 122,708,012.52 = 42,413,503.78 : x
2. Step 2: Convert to fraction form
   81,768,978.86/122,708,012.52 = 42,413,503.78/x
3. Step 3: Cross multiply
   81,768,978.86x = 122,708,012.52 × 42,413,503.78
4. Step 4: Simplify right side
   81,768,978.86x = 5,204,476,752,239,767
5. Step 5: Solve for x
   x = 5,204,476,752,239,767/81,768,978.86
6. Step 6: Final answer
   x = 63,648,547.71