Finding the Third Proportional to 623,871 and 991,696.50

Step by Step Solution

1. Step 1: Write the proportion equation
   623,871 : 991,696.50 = 991,696.50 : x
2. Step 2: Convert to fraction form
   623,871/991,696.50 = 991,696.50/x
3. Step 3: Cross multiply
   623,871x = 991,696.50 × 991,696.50
4. Step 4: Simplify right side
   623,871x = 983,461,948,112.25
5. Step 5: Solve for x
   x = 983,461,948,112.25/623,871
6. Step 6: Final answer
   x = 1,576,386.70