Finding the Third Proportional to 368,085.75 and 788,659.50

Step by Step Solution

1. Step 1: Write the proportion equation
   368,085.75 : 788,659.50 = 788,659.50 : x
2. Step 2: Convert to fraction form
   368,085.75/788,659.50 = 788,659.50/x
3. Step 3: Cross multiply
   368,085.75x = 788,659.50 × 788,659.50
4. Step 4: Simplify right side
   368,085.75x = 621,983,806,940.25
5. Step 5: Solve for x
   x = 621,983,806,940.25/368,085.75
6. Step 6: Final answer
   x = 1,689,779.64