Finding the Third Proportional to 42,168.38 and 90,590.63

Step by Step Solution

1. Step 1: Write the proportion equation
   42,168.38 : 90,590.63 = 90,590.63 : x
2. Step 2: Convert to fraction form
   42,168.38/90,590.63 = 90,590.63/x
3. Step 3: Cross multiply
   42,168.38x = 90,590.63 × 90,590.63
4. Step 4: Simplify right side
   42,168.38x = 8,206,661,337.89
5. Step 5: Solve for x
   x = 8,206,661,337.89/42,168.38
6. Step 6: Final answer
   x = 194,616.49