Finding the Third Proportional to 408,240 and 865,147.50

Step by Step Solution

1. Step 1: Write the proportion equation
   408,240 : 865,147.50 = 865,147.50 : x
2. Step 2: Convert to fraction form
   408,240/865,147.50 = 865,147.50/x
3. Step 3: Cross multiply
   408,240x = 865,147.50 × 865,147.50
4. Step 4: Simplify right side
   408,240x = 748,480,196,756.25
5. Step 5: Solve for x
   x = 748,480,196,756.25/408,240
6. Step 6: Final answer
   x = 1,833,431.80