Finding the Third Proportional to 208,158 and 438,066

Step by Step Solution

1. Step 1: Write the proportion equation
   208,158 : 438,066 = 438,066 : x
2. Step 2: Convert to fraction form
   208,158/438,066 = 438,066/x
3. Step 3: Cross multiply
   208,158x = 438,066 × 438,066
4. Step 4: Simplify right side
   208,158x = 191,901,820,356
5. Step 5: Solve for x
   x = 191,901,820,356/208,158
6. Step 6: Final answer
   x = 921,904.61