Finding the Third Proportional to 786,243 and 1,178,131.50

Step by Step Solution

1. Step 1: Write the proportion equation
   786,243 : 1,178,131.50 = 1,178,131.50 : x
2. Step 2: Convert to fraction form
   786,243/1,178,131.50 = 1,178,131.50/x
3. Step 3: Cross multiply
   786,243x = 1,178,131.50 × 1,178,131.50
4. Step 4: Simplify right side
   786,243x = 1,387,993,831,292.25
5. Step 5: Solve for x
   x = 1,387,993,831,292.25/786,243
6. Step 6: Final answer
   x = 1,765,349.68