Finding the Third Proportional to 412,128.75 and 874,801.50

Step by Step Solution

1. Step 1: Write the proportion equation
   412,128.75 : 874,801.50 = 874,801.50 : x
2. Step 2: Convert to fraction form
   412,128.75/874,801.50 = 874,801.50/x
3. Step 3: Cross multiply
   412,128.75x = 874,801.50 × 874,801.50
4. Step 4: Simplify right side
   412,128.75x = 765,277,664,402.25
5. Step 5: Solve for x
   x = 765,277,664,402.25/412,128.75
6. Step 6: Final answer
   x = 1,856,889.78