Finding the Fourth Proportional to 270,633.78, 406,010.47 and 81,086.42

Step by Step Solution

1. Step 1: Write the proportion equation
   270,633.78 : 406,010.47 = 81,086.42 : x
2. Step 2: Convert to fraction form
   270,633.78/406,010.47 = 81,086.42/x
3. Step 3: Cross multiply
   270,633.78x = 406,010.47 × 81,086.42
4. Step 4: Simplify right side
   270,633.78x = 32,921,935,494.82
5. Step 5: Solve for x
   x = 32,921,935,494.82/270,633.78
6. Step 6: Final answer
   x = 121,647.55