Finding the Third Proportional to 387,225.56 and 820,602.56

Step by Step Solution

1. Step 1: Write the proportion equation
   387,225.56 : 820,602.56 = 820,602.56 : x
2. Step 2: Convert to fraction form
   387,225.56/820,602.56 = 820,602.56/x
3. Step 3: Cross multiply
   387,225.56x = 820,602.56 × 820,602.56
4. Step 4: Simplify right side
   387,225.56x = 673,388,565,581.57
5. Step 5: Solve for x
   x = 673,388,565,581.57/387,225.56
6. Step 6: Final answer
   x = 1,739,008.55