Finding the Third Proportional to 221,616 and 456,300

Step by Step Solution

1. Step 1: Write the proportion equation
   221,616 : 456,300 = 456,300 : x
2. Step 2: Convert to fraction form
   221,616/456,300 = 456,300/x
3. Step 3: Cross multiply
   221,616x = 456,300 × 456,300
4. Step 4: Simplify right side
   221,616x = 208,209,690,000
5. Step 5: Solve for x
   x = 208,209,690,000/221,616
6. Step 6: Final answer
   x = 939,506.58