Finding the Third Proportional to 347,168 and 721,978

Step by Step Solution

1. Step 1: Write the proportion equation
   347,168 : 721,978 = 721,978 : x
2. Step 2: Convert to fraction form
   347,168/721,978 = 721,978/x
3. Step 3: Cross multiply
   347,168x = 721,978 × 721,978
4. Step 4: Simplify right side
   347,168x = 521,252,232,484
5. Step 5: Solve for x
   x = 521,252,232,484/347,168
6. Step 6: Final answer
   x = 1,501,440.89