Finding the Fourth Proportional to 42,963,139.20, 64,388,721.60 and 17,383,209.60

Step by Step Solution

1. Step 1: Write the proportion equation
   42,963,139.20 : 64,388,721.60 = 17,383,209.60 : x
2. Step 2: Convert to fraction form
   42,963,139.20/64,388,721.60 = 17,383,209.60/x
3. Step 3: Cross multiply
   42,963,139.20x = 64,388,721.60 × 17,383,209.60
4. Step 4: Simplify right side
   42,963,139.20x = 1,119,282,643,448,847.50
5. Step 5: Solve for x
   x = 1,119,282,643,448,847.50/42,963,139.20
6. Step 6: Final answer
   x = 26,052,161.56