Finding the Third Proportional to 128,799 and 187,350.75

Step by Step Solution

1. Step 1: Write the proportion equation
   128,799 : 187,350.75 = 187,350.75 : x
2. Step 2: Convert to fraction form
   128,799/187,350.75 = 187,350.75/x
3. Step 3: Cross multiply
   128,799x = 187,350.75 × 187,350.75
4. Step 4: Simplify right side
   128,799x = 35,100,303,525.56
5. Step 5: Solve for x
   x = 35,100,303,525.56/128,799
6. Step 6: Final answer
   x = 272,520.00