Finding the Third Proportional to 78,654 and 124,603.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,654 : 124,603.50 = 124,603.50 : x
2. Step 2: Convert to fraction form
   78,654/124,603.50 = 124,603.50/x
3. Step 3: Cross multiply
   78,654x = 124,603.50 × 124,603.50
4. Step 4: Simplify right side
   78,654x = 15,526,032,212.25
5. Step 5: Solve for x
   x = 15,526,032,212.25/78,654
6. Step 6: Final answer
   x = 197,396.60