Finding the Third Proportional to 128,144.53 and 192,068.72

Step by Step Solution

1. Step 1: Write the proportion equation
   128,144.53 : 192,068.72 = 192,068.72 : x
2. Step 2: Convert to fraction form
   128,144.53/192,068.72 = 192,068.72/x
3. Step 3: Cross multiply
   128,144.53x = 192,068.72 × 192,068.72
4. Step 4: Simplify right side
   128,144.53x = 36,890,392,722.27
5. Step 5: Solve for x
   x = 36,890,392,722.27/128,144.53
6. Step 6: Final answer
   x = 287,881.13