Finding the Fourth Proportional to 90,106.86, 135,076.71 and 42,744.24

Step by Step Solution

1. Step 1: Write the proportion equation
   90,106.86 : 135,076.71 = 42,744.24 : x
2. Step 2: Convert to fraction form
   90,106.86/135,076.71 = 42,744.24/x
3. Step 3: Cross multiply
   90,106.86x = 135,076.71 × 42,744.24
4. Step 4: Simplify right side
   90,106.86x = 5,773,751,310.65
5. Step 5: Solve for x
   x = 5,773,751,310.65/90,106.86
6. Step 6: Final answer
   x = 64,076.71