Finding the Third Proportional to 356,643 and 554,008.50

Step by Step Solution

1. Step 1: Write the proportion equation
   356,643 : 554,008.50 = 554,008.50 : x
2. Step 2: Convert to fraction form
   356,643/554,008.50 = 554,008.50/x
3. Step 3: Cross multiply
   356,643x = 554,008.50 × 554,008.50
4. Step 4: Simplify right side
   356,643x = 306,925,418,072.25
5. Step 5: Solve for x
   x = 306,925,418,072.25/356,643
6. Step 6: Final answer
   x = 860,595.66