Finding the Fourth Proportional to 270,109.61, 405,164.72 and 70,429.83

Step by Step Solution

1. Step 1: Write the proportion equation
   270,109.61 : 405,164.72 = 70,429.83 : x
2. Step 2: Convert to fraction form
   270,109.61/405,164.72 = 70,429.83/x
3. Step 3: Cross multiply
   270,109.61x = 405,164.72 × 70,429.83
4. Step 4: Simplify right side
   270,109.61x = 28,535,682,351.60
5. Step 5: Solve for x
   x = 28,535,682,351.60/270,109.61
6. Step 6: Final answer
   x = 105,644.82