Finding the Third Proportional to 240,345 and 556,384

Step by Step Solution

1. Step 1: Write the proportion equation
   240,345 : 556,384 = 556,384 : x
2. Step 2: Convert to fraction form
   240,345/556,384 = 556,384/x
3. Step 3: Cross multiply
   240,345x = 556,384 × 556,384
4. Step 4: Simplify right side
   240,345x = 309,563,155,456
5. Step 5: Solve for x
   x = 309,563,155,456/240,345
6. Step 6: Final answer
   x = 1,287,994.99