Finding the Third Proportional to 19,694.39 and 42,156.70

Step by Step Solution

1. Step 1: Write the proportion equation
   19,694.39 : 42,156.70 = 42,156.70 : x
2. Step 2: Convert to fraction form
   19,694.39/42,156.70 = 42,156.70/x
3. Step 3: Cross multiply
   19,694.39x = 42,156.70 × 42,156.70
4. Step 4: Simplify right side
   19,694.39x = 1,777,187,618.37
5. Step 5: Solve for x
   x = 1,777,187,618.37/19,694.39
6. Step 6: Final answer
   x = 90,238.26