Finding the Fourth Proportional to 419,076,306.37, 628,711,724.52 and 142,729,914.72

Step by Step Solution

1. Step 1: Write the proportion equation
   419,076,306.37 : 628,711,724.52 = 142,729,914.72 : x
2. Step 2: Convert to fraction form
   419,076,306.37/628,711,724.52 = 142,729,914.72/x
3. Step 3: Cross multiply
   419,076,306.37x = 628,711,724.52 × 142,729,914.72
4. Step 4: Simplify right side
   419,076,306.37x = 89,735,970,824,203,728
5. Step 5: Solve for x
   x = 89,735,970,824,203,728/419,076,306.37
6. Step 6: Final answer
   x = 214,127,998.79