Finding the Fourth Proportional to 149,841, 206,786.52 and 86,178.72

Step by Step Solution

1. Step 1: Write the proportion equation
   149,841 : 206,786.52 = 86,178.72 : x
2. Step 2: Convert to fraction form
   149,841/206,786.52 = 86,178.72/x
3. Step 3: Cross multiply
   149,841x = 206,786.52 × 86,178.72
4. Step 4: Simplify right side
   149,841x = 17,820,597,606.85
5. Step 5: Solve for x
   x = 17,820,597,606.85/149,841
6. Step 6: Final answer
   x = 118,930.05