Finding the Fourth Proportional to 90,329.60, 135,392.91 and 42,905.88

Step by Step Solution

1. Step 1: Write the proportion equation
   90,329.60 : 135,392.91 = 42,905.88 : x
2. Step 2: Convert to fraction form
   90,329.60/135,392.91 = 42,905.88/x
3. Step 3: Cross multiply
   90,329.60x = 135,392.91 × 42,905.88
4. Step 4: Simplify right side
   90,329.60x = 5,809,151,949.31
5. Step 5: Solve for x
   x = 5,809,151,949.31/90,329.60
6. Step 6: Final answer
   x = 64,310.62