Finding the Third Proportional to 19,428 and 42,370

Step by Step Solution

1. Step 1: Write the proportion equation
   19,428 : 42,370 = 42,370 : x
2. Step 2: Convert to fraction form
   19,428/42,370 = 42,370/x
3. Step 3: Cross multiply
   19,428x = 42,370 × 42,370
4. Step 4: Simplify right side
   19,428x = 1,795,216,900
5. Step 5: Solve for x
   x = 1,795,216,900/19,428
6. Step 6: Final answer
   x = 92,403.59