Finding the Third Proportional to 90,720 and 199,152

Step by Step Solution

1. Step 1: Write the proportion equation
   90,720 : 199,152 = 199,152 : x
2. Step 2: Convert to fraction form
   90,720/199,152 = 199,152/x
3. Step 3: Cross multiply
   90,720x = 199,152 × 199,152
4. Step 4: Simplify right side
   90,720x = 39,661,519,104
5. Step 5: Solve for x
   x = 39,661,519,104/90,720
6. Step 6: Final answer
   x = 437,186.06