Finding the Fourth Proportional to 120,323.73, 165,974.10 and 77,288.73

Step by Step Solution

1. Step 1: Write the proportion equation
   120,323.73 : 165,974.10 = 77,288.73 : x
2. Step 2: Convert to fraction form
   120,323.73/165,974.10 = 77,288.73/x
3. Step 3: Cross multiply
   120,323.73x = 165,974.10 × 77,288.73
4. Step 4: Simplify right side
   120,323.73x = 12,827,927,401.89
5. Step 5: Solve for x
   x = 12,827,927,401.89/120,323.73
6. Step 6: Final answer
   x = 106,611.78