Finding the Third Proportional to 19,640.13 and 42,392.75

Step by Step Solution

1. Step 1: Write the proportion equation
   19,640.13 : 42,392.75 = 42,392.75 : x
2. Step 2: Convert to fraction form
   19,640.13/42,392.75 = 42,392.75/x
3. Step 3: Cross multiply
   19,640.13x = 42,392.75 × 42,392.75
4. Step 4: Simplify right side
   19,640.13x = 1,797,145,252.56
5. Step 5: Solve for x
   x = 1,797,145,252.56/19,640.13
6. Step 6: Final answer
   x = 91,503.76