Finding the Third Proportional to 28,709 and 42,213

Step by Step Solution

1. Step 1: Write the proportion equation
   28,709 : 42,213 = 42,213 : x
2. Step 2: Convert to fraction form
   28,709/42,213 = 42,213/x
3. Step 3: Cross multiply
   28,709x = 42,213 × 42,213
4. Step 4: Simplify right side
   28,709x = 1,781,937,369
5. Step 5: Solve for x
   x = 1,781,937,369/28,709
6. Step 6: Final answer
   x = 62,068.95