Finding the Fourth Proportional to 90,649.47, 135,935.76 and 43,209.69

Step by Step Solution

1. Step 1: Write the proportion equation
   90,649.47 : 135,935.76 = 43,209.69 : x
2. Step 2: Convert to fraction form
   90,649.47/135,935.76 = 43,209.69/x
3. Step 3: Cross multiply
   90,649.47x = 135,935.76 × 43,209.69
4. Step 4: Simplify right side
   90,649.47x = 5,873,741,477.86
5. Step 5: Solve for x
   x = 5,873,741,477.86/90,649.47
6. Step 6: Final answer
   x = 64,796.20