Finding the Third Proportional to 59,487 and 128,774.25

Step by Step Solution

1. Step 1: Write the proportion equation
   59,487 : 128,774.25 = 128,774.25 : x
2. Step 2: Convert to fraction form
   59,487/128,774.25 = 128,774.25/x
3. Step 3: Cross multiply
   59,487x = 128,774.25 × 128,774.25
4. Step 4: Simplify right side
   59,487x = 16,582,807,463.06
5. Step 5: Solve for x
   x = 16,582,807,463.06/59,487
6. Step 6: Final answer
   x = 278,763.55