Finding the Third Proportional to 42,147 and 87,401.25

Step by Step Solution

1. Step 1: Write the proportion equation
   42,147 : 87,401.25 = 87,401.25 : x
2. Step 2: Convert to fraction form
   42,147/87,401.25 = 87,401.25/x
3. Step 3: Cross multiply
   42,147x = 87,401.25 × 87,401.25
4. Step 4: Simplify right side
   42,147x = 7,638,978,501.56
5. Step 5: Solve for x
   x = 7,638,978,501.56/42,147
6. Step 6: Final answer
   x = 181,246.08