Finding the Third Proportional to 28,736 and 42,931

Step by Step Solution

1. Step 1: Write the proportion equation
   28,736 : 42,931 = 42,931 : x
2. Step 2: Convert to fraction form
   28,736/42,931 = 42,931/x
3. Step 3: Cross multiply
   28,736x = 42,931 × 42,931
4. Step 4: Simplify right side
   28,736x = 1,843,070,761
5. Step 5: Solve for x
   x = 1,843,070,761/28,736
6. Step 6: Final answer
   x = 64,138.04