Finding the Third Proportional to 515,111 and 788,030

Step by Step Solution

1. Step 1: Write the proportion equation
   515,111 : 788,030 = 788,030 : x
2. Step 2: Convert to fraction form
   515,111/788,030 = 788,030/x
3. Step 3: Cross multiply
   515,111x = 788,030 × 788,030
4. Step 4: Simplify right side
   515,111x = 620,991,280,900
5. Step 5: Solve for x
   x = 620,991,280,900/515,111
6. Step 6: Final answer
   x = 1,205,548.48