Finding the Third Proportional to 411,984 and 636,641.50

Step by Step Solution

1. Step 1: Write the proportion equation
   411,984 : 636,641.50 = 636,641.50 : x
2. Step 2: Convert to fraction form
   411,984/636,641.50 = 636,641.50/x
3. Step 3: Cross multiply
   411,984x = 636,641.50 × 636,641.50
4. Step 4: Simplify right side
   411,984x = 405,312,399,522.25
5. Step 5: Solve for x
   x = 405,312,399,522.25/411,984
6. Step 6: Final answer
   x = 983,806.17