Finding the Third Proportional to 619,518 and 911,131

Step by Step Solution

1. Step 1: Write the proportion equation
   619,518 : 911,131 = 911,131 : x
2. Step 2: Convert to fraction form
   619,518/911,131 = 911,131/x
3. Step 3: Cross multiply
   619,518x = 911,131 × 911,131
4. Step 4: Simplify right side
   619,518x = 830,159,699,161
5. Step 5: Solve for x
   x = 830,159,699,161/619,518
6. Step 6: Final answer
   x = 1,340,009.01