Finding the Third Proportional to 556,776 and 1,213,920

Step by Step Solution

1. Step 1: Write the proportion equation
   556,776 : 1,213,920 = 1,213,920 : x
2. Step 2: Convert to fraction form
   556,776/1,213,920 = 1,213,920/x
3. Step 3: Cross multiply
   556,776x = 1,213,920 × 1,213,920
4. Step 4: Simplify right side
   556,776x = 1,473,601,766,400
5. Step 5: Solve for x
   x = 1,473,601,766,400/556,776
6. Step 6: Final answer
   x = 2,646,668.98