Finding the Fourth Proportional to 117,261,297.72, 161,839,989.56 and 65,067,148.51

Step by Step Solution

1. Step 1: Write the proportion equation
   117,261,297.72 : 161,839,989.56 = 65,067,148.51 : x
2. Step 2: Convert to fraction form
   117,261,297.72/161,839,989.56 = 65,067,148.51/x
3. Step 3: Cross multiply
   117,261,297.72x = 161,839,989.56 × 65,067,148.51
4. Step 4: Simplify right side
   117,261,297.72x = 10,530,466,635,315,438
5. Step 5: Solve for x
   x = 10,530,466,635,315,438/117,261,297.72
6. Step 6: Final answer
   x = 89,803,429.09