Finding the Third Proportional to 67,978.50 and 103,407

Step by Step Solution

1. Step 1: Write the proportion equation
   67,978.50 : 103,407 = 103,407 : x
2. Step 2: Convert to fraction form
   67,978.50/103,407 = 103,407/x
3. Step 3: Cross multiply
   67,978.50x = 103,407 × 103,407
4. Step 4: Simplify right side
   67,978.50x = 10,693,007,649
5. Step 5: Solve for x
   x = 10,693,007,649/67,978.50
6. Step 6: Final answer
   x = 157,299.85