Finding the Third Proportional to 815,397 and 1,199,128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   815,397 : 1,199,128.50 = 1,199,128.50 : x
2. Step 2: Convert to fraction form
   815,397/1,199,128.50 = 1,199,128.50/x
3. Step 3: Cross multiply
   815,397x = 1,199,128.50 × 1,199,128.50
4. Step 4: Simplify right side
   815,397x = 1,437,909,159,512.25
5. Step 5: Solve for x
   x = 1,437,909,159,512.25/815,397
6. Step 6: Final answer
   x = 1,763,446.71