Finding the Third Proportional to 28,143 and 42,417

Step by Step Solution

1. Step 1: Write the proportion equation
   28,143 : 42,417 = 42,417 : x
2. Step 2: Convert to fraction form
   28,143/42,417 = 42,417/x
3. Step 3: Cross multiply
   28,143x = 42,417 × 42,417
4. Step 4: Simplify right side
   28,143x = 1,799,201,889
5. Step 5: Solve for x
   x = 1,799,201,889/28,143
6. Step 6: Final answer
   x = 63,930.71