Finding the Fourth Proportional to 90,648.47, 135,934.27 and 43,208.69

Step by Step Solution

1. Step 1: Write the proportion equation
   90,648.47 : 135,934.27 = 43,208.69 : x
2. Step 2: Convert to fraction form
   90,648.47/135,934.27 = 43,208.69/x
3. Step 3: Cross multiply
   90,648.47x = 135,934.27 × 43,208.69
4. Step 4: Simplify right side
   90,648.47x = 5,873,540,864.10
5. Step 5: Solve for x
   x = 5,873,540,864.10/90,648.47
6. Step 6: Final answer
   x = 64,794.70