Finding the Fourth Proportional to 120,386.58, 166,138.86 and 65,942.58

Step by Step Solution

1. Step 1: Write the proportion equation
   120,386.58 : 166,138.86 = 65,942.58 : x
2. Step 2: Convert to fraction form
   120,386.58/166,138.86 = 65,942.58/x
3. Step 3: Cross multiply
   120,386.58x = 166,138.86 × 65,942.58
4. Step 4: Simplify right side
   120,386.58x = 10,955,624,443.64
5. Step 5: Solve for x
   x = 10,955,624,443.64/120,386.58
6. Step 6: Final answer
   x = 91,003.70