Finding the Fourth Proportional to 258,601,108.72, 387,892,215.12 and 76,843,562.80

Step by Step Solution

1. Step 1: Write the proportion equation
   258,601,108.72 : 387,892,215.12 = 76,843,562.80 : x
2. Step 2: Convert to fraction form
   258,601,108.72/387,892,215.12 = 76,843,562.80/x
3. Step 3: Cross multiply
   258,601,108.72x = 387,892,215.12 × 76,843,562.80
4. Step 4: Simplify right side
   258,601,108.72x = 29,807,019,792,204,828
5. Step 5: Solve for x
   x = 29,807,019,792,204,828/258,601,108.72
6. Step 6: Final answer
   x = 115,262,536.73