Finding the Third Proportional to 89,603.63 and 139,849.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,603.63 : 139,849.50 = 139,849.50 : x
2. Step 2: Convert to fraction form
   89,603.63/139,849.50 = 139,849.50/x
3. Step 3: Cross multiply
   89,603.63x = 139,849.50 × 139,849.50
4. Step 4: Simplify right side
   89,603.63x = 19,557,882,650.25
5. Step 5: Solve for x
   x = 19,557,882,650.25/89,603.63
6. Step 6: Final answer
   x = 218,271.11