Finding the Third Proportional to 489,236 and 746,507.50

Step by Step Solution

1. Step 1: Write the proportion equation
   489,236 : 746,507.50 = 746,507.50 : x
2. Step 2: Convert to fraction form
   489,236/746,507.50 = 746,507.50/x
3. Step 3: Cross multiply
   489,236x = 746,507.50 × 746,507.50
4. Step 4: Simplify right side
   489,236x = 557,273,447,556.25
5. Step 5: Solve for x
   x = 557,273,447,556.25/489,236
6. Step 6: Final answer
   x = 1,139,068.77