Finding the Fourth Proportional to 312,628,270.56, 431,144,748.72 and 195,164,429.28

Step by Step Solution

1. Step 1: Write the proportion equation
   312,628,270.56 : 431,144,748.72 = 195,164,429.28 : x
2. Step 2: Convert to fraction form
   312,628,270.56/431,144,748.72 = 195,164,429.28/x
3. Step 3: Cross multiply
   312,628,270.56x = 431,144,748.72 × 195,164,429.28
4. Step 4: Simplify right side
   312,628,270.56x = 84,144,118,821,007,824
5. Step 5: Solve for x
   x = 84,144,118,821,007,824/312,628,270.56
6. Step 6: Final answer
   x = 269,150,703.07