Finding the Third Proportional to 286,285.50 and 430,066

Step by Step Solution

1. Step 1: Write the proportion equation
   286,285.50 : 430,066 = 430,066 : x
2. Step 2: Convert to fraction form
   286,285.50/430,066 = 430,066/x
3. Step 3: Cross multiply
   286,285.50x = 430,066 × 430,066
4. Step 4: Simplify right side
   286,285.50x = 184,956,764,356
5. Step 5: Solve for x
   x = 184,956,764,356/286,285.50
6. Step 6: Final answer
   x = 646,057.05