Finding the Third Proportional to 551,108 and 780,030

Step by Step Solution

1. Step 1: Write the proportion equation
   551,108 : 780,030 = 780,030 : x
2. Step 2: Convert to fraction form
   551,108/780,030 = 780,030/x
3. Step 3: Cross multiply
   551,108x = 780,030 × 780,030
4. Step 4: Simplify right side
   551,108x = 608,446,800,900
5. Step 5: Solve for x
   x = 608,446,800,900/551,108
6. Step 6: Final answer
   x = 1,104,042.77