Finding the Fourth Proportional to 120,297,993.72, 166,011,550.82 and 65,293,850.20

Step by Step Solution

1. Step 1: Write the proportion equation
   120,297,993.72 : 166,011,550.82 = 65,293,850.20 : x
2. Step 2: Convert to fraction form
   120,297,993.72/166,011,550.82 = 65,293,850.20/x
3. Step 3: Cross multiply
   120,297,993.72x = 166,011,550.82 × 65,293,850.20
4. Step 4: Simplify right side
   120,297,993.72x = 10,839,533,330,710,768
5. Step 5: Solve for x
   x = 10,839,533,330,710,768/120,297,993.72
6. Step 6: Final answer
   x = 90,105,686.68