Finding the Third Proportional to 42,709 and 90,339

Step by Step Solution

1. Step 1: Write the proportion equation
   42,709 : 90,339 = 90,339 : x
2. Step 2: Convert to fraction form
   42,709/90,339 = 90,339/x
3. Step 3: Cross multiply
   42,709x = 90,339 × 90,339
4. Step 4: Simplify right side
   42,709x = 8,161,134,921
5. Step 5: Solve for x
   x = 8,161,134,921/42,709
6. Step 6: Final answer
   x = 191,087.01