Finding the Third Proportional to 42,086.25 and 90,009.75

Step by Step Solution

1. Step 1: Write the proportion equation
   42,086.25 : 90,009.75 = 90,009.75 : x
2. Step 2: Convert to fraction form
   42,086.25/90,009.75 = 90,009.75/x
3. Step 3: Cross multiply
   42,086.25x = 90,009.75 × 90,009.75
4. Step 4: Simplify right side
   42,086.25x = 8,101,755,095.06
5. Step 5: Solve for x
   x = 8,101,755,095.06/42,086.25
6. Step 6: Final answer
   x = 192,503.61