Finding the Third Proportional to 28,715 and 42,070

Step by Step Solution

1. Step 1: Write the proportion equation
   28,715 : 42,070 = 42,070 : x
2. Step 2: Convert to fraction form
   28,715/42,070 = 42,070/x
3. Step 3: Cross multiply
   28,715x = 42,070 × 42,070
4. Step 4: Simplify right side
   28,715x = 1,769,884,900
5. Step 5: Solve for x
   x = 1,769,884,900/28,715
6. Step 6: Final answer
   x = 61,636.25