Finding the Third Proportional to 289,926 and 438,066.56

Step by Step Solution

1. Step 1: Write the proportion equation
   289,926 : 438,066.56 = 438,066.56 : x
2. Step 2: Convert to fraction form
   289,926/438,066.56 = 438,066.56/x
3. Step 3: Cross multiply
   289,926x = 438,066.56 × 438,066.56
4. Step 4: Simplify right side
   289,926x = 191,902,313,180.57
5. Step 5: Solve for x
   x = 191,902,313,180.57/289,926
6. Step 6: Final answer
   x = 661,901.01