Finding the Third Proportional to 356,899.50 and 525,487.50

Step by Step Solution

1. Step 1: Write the proportion equation
   356,899.50 : 525,487.50 = 525,487.50 : x
2. Step 2: Convert to fraction form
   356,899.50/525,487.50 = 525,487.50/x
3. Step 3: Cross multiply
   356,899.50x = 525,487.50 × 525,487.50
4. Step 4: Simplify right side
   356,899.50x = 276,137,112,656.25
5. Step 5: Solve for x
   x = 276,137,112,656.25/356,899.50
6. Step 6: Final answer
   x = 773,711.12