Finding the Third Proportional to 70,148 and 91,978

Step by Step Solution

1. Step 1: Write the proportion equation
   70,148 : 91,978 = 91,978 : x
2. Step 2: Convert to fraction form
   70,148/91,978 = 91,978/x
3. Step 3: Cross multiply
   70,148x = 91,978 × 91,978
4. Step 4: Simplify right side
   70,148x = 8,459,952,484
5. Step 5: Solve for x
   x = 8,459,952,484/70,148
6. Step 6: Final answer
   x = 120,601.48