Finding the Third Proportional to 199,948.50 and 438,642

Step by Step Solution

1. Step 1: Write the proportion equation
   199,948.50 : 438,642 = 438,642 : x
2. Step 2: Convert to fraction form
   199,948.50/438,642 = 438,642/x
3. Step 3: Cross multiply
   199,948.50x = 438,642 × 438,642
4. Step 4: Simplify right side
   199,948.50x = 192,406,804,164
5. Step 5: Solve for x
   x = 192,406,804,164/199,948.50
6. Step 6: Final answer
   x = 962,281.81