Finding the Third Proportional to 19,172 and 28,428

Step by Step Solution

1. Step 1: Write the proportion equation
   19,172 : 28,428 = 28,428 : x
2. Step 2: Convert to fraction form
   19,172/28,428 = 28,428/x
3. Step 3: Cross multiply
   19,172x = 28,428 × 28,428
4. Step 4: Simplify right side
   19,172x = 808,151,184
5. Step 5: Solve for x
   x = 808,151,184/19,172
6. Step 6: Final answer
   x = 42,152.68