Finding the Third Proportional to 128,085.75 and 191,088

Step by Step Solution

1. Step 1: Write the proportion equation
   128,085.75 : 191,088 = 191,088 : x
2. Step 2: Convert to fraction form
   128,085.75/191,088 = 191,088/x
3. Step 3: Cross multiply
   128,085.75x = 191,088 × 191,088
4. Step 4: Simplify right side
   128,085.75x = 36,514,623,744
5. Step 5: Solve for x
   x = 36,514,623,744/128,085.75
6. Step 6: Final answer
   x = 285,079.52