Finding the Third Proportional to 354,673 and 535,687.50

Step by Step Solution

1. Step 1: Write the proportion equation
   354,673 : 535,687.50 = 535,687.50 : x
2. Step 2: Convert to fraction form
   354,673/535,687.50 = 535,687.50/x
3. Step 3: Cross multiply
   354,673x = 535,687.50 × 535,687.50
4. Step 4: Simplify right side
   354,673x = 286,961,097,656.25
5. Step 5: Solve for x
   x = 286,961,097,656.25/354,673
6. Step 6: Final answer
   x = 809,086.39