Finding the Third Proportional to 308,394 and 492,111

Step by Step Solution

1. Step 1: Write the proportion equation
   308,394 : 492,111 = 492,111 : x
2. Step 2: Convert to fraction form
   308,394/492,111 = 492,111/x
3. Step 3: Cross multiply
   308,394x = 492,111 × 492,111
4. Step 4: Simplify right side
   308,394x = 242,173,236,321
5. Step 5: Solve for x
   x = 242,173,236,321/308,394
6. Step 6: Final answer
   x = 785,272.20