Finding the Third Proportional to 42,138.94 and 90,531.38

Step by Step Solution

1. Step 1: Write the proportion equation
   42,138.94 : 90,531.38 = 90,531.38 : x
2. Step 2: Convert to fraction form
   42,138.94/90,531.38 = 90,531.38/x
3. Step 3: Cross multiply
   42,138.94x = 90,531.38 × 90,531.38
4. Step 4: Simplify right side
   42,138.94x = 8,195,929,859.39
5. Step 5: Solve for x
   x = 8,195,929,859.39/42,138.94
6. Step 6: Final answer
   x = 194,497.78