Finding the Fourth Proportional to 166,073.63, 248,943.89 and 86,066.79

Step by Step Solution

1. Step 1: Write the proportion equation
   166,073.63 : 248,943.89 = 86,066.79 : x
2. Step 2: Convert to fraction form
   166,073.63/248,943.89 = 86,066.79/x
3. Step 3: Cross multiply
   166,073.63x = 248,943.89 × 86,066.79
4. Step 4: Simplify right side
   166,073.63x = 21,425,800,784.04
5. Step 5: Solve for x
   x = 21,425,800,784.04/166,073.63
6. Step 6: Final answer
   x = 129,013.87