Finding the Third Proportional to 61,773.50 and 128,908

Step by Step Solution

1. Step 1: Write the proportion equation
   61,773.50 : 128,908 = 128,908 : x
2. Step 2: Convert to fraction form
   61,773.50/128,908 = 128,908/x
3. Step 3: Cross multiply
   61,773.50x = 128,908 × 128,908
4. Step 4: Simplify right side
   61,773.50x = 16,617,272,464
5. Step 5: Solve for x
   x = 16,617,272,464/61,773.50
6. Step 6: Final answer
   x = 269,003.25