Finding the Third Proportional to 392,053.50 and 552,109.50

Step by Step Solution

1. Step 1: Write the proportion equation
   392,053.50 : 552,109.50 = 552,109.50 : x
2. Step 2: Convert to fraction form
   392,053.50/552,109.50 = 552,109.50/x
3. Step 3: Cross multiply
   392,053.50x = 552,109.50 × 552,109.50
4. Step 4: Simplify right side
   392,053.50x = 304,824,899,990.25
5. Step 5: Solve for x
   x = 304,824,899,990.25/392,053.50
6. Step 6: Final answer
   x = 777,508.43