Finding the Fourth Proportional to 258,450,318.76, 356,662,548.72 and 140,978,209

Step by Step Solution

1. Step 1: Write the proportion equation
   258,450,318.76 : 356,662,548.72 = 140,978,209 : x
2. Step 2: Convert to fraction form
   258,450,318.76/356,662,548.72 = 140,978,209/x
3. Step 3: Cross multiply
   258,450,318.76x = 356,662,548.72 × 140,978,209
4. Step 4: Simplify right side
   258,450,318.76x = 50,281,647,335,920,848
5. Step 5: Solve for x
   x = 50,281,647,335,920,848/258,450,318.76
6. Step 6: Final answer
   x = 194,550,533.26