Finding the Fourth Proportional to 120,660,192, 166,509,665.28 and 65,655,100.80

Step by Step Solution

1. Step 1: Write the proportion equation
   120,660,192 : 166,509,665.28 = 65,655,100.80 : x
2. Step 2: Convert to fraction form
   120,660,192/166,509,665.28 = 65,655,100.80/x
3. Step 3: Cross multiply
   120,660,192x = 166,509,665.28 × 65,655,100.80
4. Step 4: Simplify right side
   120,660,192x = 10,932,208,858,132,660
5. Step 5: Solve for x
   x = 10,932,208,858,132,660/120,660,192
6. Step 6: Final answer
   x = 90,603,277.49