Finding the Third Proportional to 404,300.25 and 478,111.50

Step by Step Solution

1. Step 1: Write the proportion equation
   404,300.25 : 478,111.50 = 478,111.50 : x
2. Step 2: Convert to fraction form
   404,300.25/478,111.50 = 478,111.50/x
3. Step 3: Cross multiply
   404,300.25x = 478,111.50 × 478,111.50
4. Step 4: Simplify right side
   404,300.25x = 228,590,606,432.25
5. Step 5: Solve for x
   x = 228,590,606,432.25/404,300.25
6. Step 6: Final answer
   x = 565,398.13