Finding the Third Proportional to 515,146.50 and 788,017.50

Step by Step Solution

1. Step 1: Write the proportion equation
   515,146.50 : 788,017.50 = 788,017.50 : x
2. Step 2: Convert to fraction form
   515,146.50/788,017.50 = 788,017.50/x
3. Step 3: Cross multiply
   515,146.50x = 788,017.50 × 788,017.50
4. Step 4: Simplify right side
   515,146.50x = 620,971,580,306.25
5. Step 5: Solve for x
   x = 620,971,580,306.25/515,146.50
6. Step 6: Final answer
   x = 1,205,427.16