Finding the Third Proportional to 285,009.50 and 400,860.50

Step by Step Solution

1. Step 1: Write the proportion equation
   285,009.50 : 400,860.50 = 400,860.50 : x
2. Step 2: Convert to fraction form
   285,009.50/400,860.50 = 400,860.50/x
3. Step 3: Cross multiply
   285,009.50x = 400,860.50 × 400,860.50
4. Step 4: Simplify right side
   285,009.50x = 160,689,140,460.25
5. Step 5: Solve for x
   x = 160,689,140,460.25/285,009.50
6. Step 6: Final answer
   x = 563,802.75