Finding the Fourth Proportional to 120,899.47, 166,922.63 and 108,112.81

Step by Step Solution

1. Step 1: Write the proportion equation
   120,899.47 : 166,922.63 = 108,112.81 : x
2. Step 2: Convert to fraction form
   120,899.47/166,922.63 = 108,112.81/x
3. Step 3: Cross multiply
   120,899.47x = 166,922.63 × 108,112.81
4. Step 4: Simplify right side
   120,899.47x = 18,046,474,581.89
5. Step 5: Solve for x
   x = 18,046,474,581.89/120,899.47
6. Step 6: Final answer
   x = 149,268.43