Finding the Fourth Proportional to 261,858,401.91, 392,773,365.50 and 80,105,579.91

Step by Step Solution

1. Step 1: Write the proportion equation
   261,858,401.91 : 392,773,365.50 = 80,105,579.91 : x
2. Step 2: Convert to fraction form
   261,858,401.91/392,773,365.50 = 80,105,579.91/x
3. Step 3: Cross multiply
   261,858,401.91x = 392,773,365.50 × 80,105,579.91
4. Step 4: Simplify right side
   261,858,401.91x = 31,463,338,216,179,360
5. Step 5: Solve for x
   x = 31,463,338,216,179,360/261,858,401.91
6. Step 6: Final answer
   x = 120,154,014.49