Finding the Third Proportional to 28,520 and 42,868

Step by Step Solution

1. Step 1: Write the proportion equation
   28,520 : 42,868 = 42,868 : x
2. Step 2: Convert to fraction form
   28,520/42,868 = 42,868/x
3. Step 3: Cross multiply
   28,520x = 42,868 × 42,868
4. Step 4: Simplify right side
   28,520x = 1,837,665,424
5. Step 5: Solve for x
   x = 1,837,665,424/28,520
6. Step 6: Final answer
   x = 64,434.27