Finding the Fourth Proportional to 120,347.60, 166,081.76 and 65,904.56

Step by Step Solution

1. Step 1: Write the proportion equation
   120,347.60 : 166,081.76 = 65,904.56 : x
2. Step 2: Convert to fraction form
   120,347.60/166,081.76 = 65,904.56/x
3. Step 3: Cross multiply
   120,347.60x = 166,081.76 × 65,904.56
4. Step 4: Simplify right side
   120,347.60x = 10,945,545,316.83
5. Step 5: Solve for x
   x = 10,945,545,316.83/120,347.60
6. Step 6: Final answer
   x = 90,949.43