Finding the Fourth Proportional to 91,604.49, 137,426.34 and 28,423.23

Step by Step Solution

1. Step 1: Write the proportion equation
   91,604.49 : 137,426.34 = 28,423.23 : x
2. Step 2: Convert to fraction form
   91,604.49/137,426.34 = 28,423.23/x
3. Step 3: Cross multiply
   91,604.49x = 137,426.34 × 28,423.23
4. Step 4: Simplify right side
   91,604.49x = 3,906,100,469.88
5. Step 5: Solve for x
   x = 3,906,100,469.88/91,604.49
6. Step 6: Final answer
   x = 42,640.93