Finding the Third Proportional to 831,021 and 1,188,256.50

Step by Step Solution

1. Step 1: Write the proportion equation
   831,021 : 1,188,256.50 = 1,188,256.50 : x
2. Step 2: Convert to fraction form
   831,021/1,188,256.50 = 1,188,256.50/x
3. Step 3: Cross multiply
   831,021x = 1,188,256.50 × 1,188,256.50
4. Step 4: Simplify right side
   831,021x = 1,411,953,509,792.25
5. Step 5: Solve for x
   x = 1,411,953,509,792.25/831,021
6. Step 6: Final answer
   x = 1,699,058.76