Finding the Fourth Proportional to 270,956.27, 406,686.59 and 137,936.12

Step by Step Solution

1. Step 1: Write the proportion equation
   270,956.27 : 406,686.59 = 137,936.12 : x
2. Step 2: Convert to fraction form
   270,956.27/406,686.59 = 137,936.12/x
3. Step 3: Cross multiply
   270,956.27x = 406,686.59 × 137,936.12
4. Step 4: Simplify right side
   270,956.27x = 56,096,768,074.78
5. Step 5: Solve for x
   x = 56,096,768,074.78/270,956.27
6. Step 6: Final answer
   x = 207,032.55