Finding the Third Proportional to 282,139.50 and 432,066

Step by Step Solution

1. Step 1: Write the proportion equation
   282,139.50 : 432,066 = 432,066 : x
2. Step 2: Convert to fraction form
   282,139.50/432,066 = 432,066/x
3. Step 3: Cross multiply
   282,139.50x = 432,066 × 432,066
4. Step 4: Simplify right side
   282,139.50x = 186,681,028,356
5. Step 5: Solve for x
   x = 186,681,028,356/282,139.50
6. Step 6: Final answer
   x = 661,662.15