Finding the Third Proportional to 354,703.50 and 788,139

Step by Step Solution

1. Step 1: Write the proportion equation
   354,703.50 : 788,139 = 788,139 : x
2. Step 2: Convert to fraction form
   354,703.50/788,139 = 788,139/x
3. Step 3: Cross multiply
   354,703.50x = 788,139 × 788,139
4. Step 4: Simplify right side
   354,703.50x = 621,163,083,321
5. Step 5: Solve for x
   x = 621,163,083,321/354,703.50
6. Step 6: Final answer
   x = 1,751,217.80