Finding the Fourth Proportional to 120,290,540.38, 166,001,105.91 and 65,286,396.88

Step by Step Solution

1. Step 1: Write the proportion equation
   120,290,540.38 : 166,001,105.91 = 65,286,396.88 : x
2. Step 2: Convert to fraction form
   120,290,540.38/166,001,105.91 = 65,286,396.88/x
3. Step 3: Cross multiply
   120,290,540.38x = 166,001,105.91 × 65,286,396.88
4. Step 4: Simplify right side
   120,290,540.38x = 10,837,614,082,959,174
5. Step 5: Solve for x
   x = 10,837,614,082,959,174/120,290,540.38
6. Step 6: Final answer
   x = 90,095,314.63