Finding the Third Proportional to 90,699.75 and 187,221.38

Step by Step Solution

1. Step 1: Write the proportion equation
   90,699.75 : 187,221.38 = 187,221.38 : x
2. Step 2: Convert to fraction form
   90,699.75/187,221.38 = 187,221.38/x
3. Step 3: Cross multiply
   90,699.75x = 187,221.38 × 187,221.38
4. Step 4: Simplify right side
   90,699.75x = 35,051,843,256.89
5. Step 5: Solve for x
   x = 35,051,843,256.89/90,699.75
6. Step 6: Final answer
   x = 386,460.20