Finding the Third Proportional to 308,981.25 and 478,173.38

Step by Step Solution

1. Step 1: Write the proportion equation
   308,981.25 : 478,173.38 = 478,173.38 : x
2. Step 2: Convert to fraction form
   308,981.25/478,173.38 = 478,173.38/x
3. Step 3: Cross multiply
   308,981.25x = 478,173.38 × 478,173.38
4. Step 4: Simplify right side
   308,981.25x = 228,649,776,558.89
5. Step 5: Solve for x
   x = 228,649,776,558.89/308,981.25
6. Step 6: Final answer
   x = 740,011.82