Finding the Third Proportional to 42,210 and 90,069.75

Step by Step Solution

1. Step 1: Write the proportion equation
   42,210 : 90,069.75 = 90,069.75 : x
2. Step 2: Convert to fraction form
   42,210/90,069.75 = 90,069.75/x
3. Step 3: Cross multiply
   42,210x = 90,069.75 × 90,069.75
4. Step 4: Simplify right side
   42,210x = 8,112,559,865.06
5. Step 5: Solve for x
   x = 8,112,559,865.06/42,210
6. Step 6: Final answer
   x = 192,195.21