Finding the Fourth Proportional to 42,965,978.09, 64,448,336.10 and 10,617,879.75

Step by Step Solution

1. Step 1: Write the proportion equation
   42,965,978.09 : 64,448,336.10 = 10,617,879.75 : x
2. Step 2: Convert to fraction form
   42,965,978.09/64,448,336.10 = 10,617,879.75/x
3. Step 3: Cross multiply
   42,965,978.09x = 64,448,336.10 × 10,617,879.75
4. Step 4: Simplify right side
   42,965,978.09x = 684,304,682,797,384
5. Step 5: Solve for x
   x = 684,304,682,797,384/42,965,978.09
6. Step 6: Final answer
   x = 15,926,663.68