Finding the Third Proportional to 771,637.50 and 1,172,839.50

Step by Step Solution

1. Step 1: Write the proportion equation
   771,637.50 : 1,172,839.50 = 1,172,839.50 : x
2. Step 2: Convert to fraction form
   771,637.50/1,172,839.50 = 1,172,839.50/x
3. Step 3: Cross multiply
   771,637.50x = 1,172,839.50 × 1,172,839.50
4. Step 4: Simplify right side
   771,637.50x = 1,375,552,492,760.25
5. Step 5: Solve for x
   x = 1,375,552,492,760.25/771,637.50
6. Step 6: Final answer
   x = 1,782,640.80