Finding the Third Proportional to 218,386 and 476,300

Step by Step Solution

1. Step 1: Write the proportion equation
   218,386 : 476,300 = 476,300 : x
2. Step 2: Convert to fraction form
   218,386/476,300 = 476,300/x
3. Step 3: Cross multiply
   218,386x = 476,300 × 476,300
4. Step 4: Simplify right side
   218,386x = 226,861,690,000
5. Step 5: Solve for x
   x = 226,861,690,000/218,386
6. Step 6: Final answer
   x = 1,038,810.59