Finding the Third Proportional to 205,210 and 438,791.50

Step by Step Solution

1. Step 1: Write the proportion equation
   205,210 : 438,791.50 = 438,791.50 : x
2. Step 2: Convert to fraction form
   205,210/438,791.50 = 438,791.50/x
3. Step 3: Cross multiply
   205,210x = 438,791.50 × 438,791.50
4. Step 4: Simplify right side
   205,210x = 192,537,980,472.25
5. Step 5: Solve for x
   x = 192,537,980,472.25/205,210
6. Step 6: Final answer
   x = 938,248.53