Finding the Third Proportional to 169,139.25 and 371,758.50

Step by Step Solution

1. Step 1: Write the proportion equation
   169,139.25 : 371,758.50 = 371,758.50 : x
2. Step 2: Convert to fraction form
   169,139.25/371,758.50 = 371,758.50/x
3. Step 3: Cross multiply
   169,139.25x = 371,758.50 × 371,758.50
4. Step 4: Simplify right side
   169,139.25x = 138,204,382,322.25
5. Step 5: Solve for x
   x = 138,204,382,322.25/169,139.25
6. Step 6: Final answer
   x = 817,104.15