Finding the Third Proportional to 27,688 and 42,988

Step by Step Solution

1. Step 1: Write the proportion equation
   27,688 : 42,988 = 42,988 : x
2. Step 2: Convert to fraction form
   27,688/42,988 = 42,988/x
3. Step 3: Cross multiply
   27,688x = 42,988 × 42,988
4. Step 4: Simplify right side
   27,688x = 1,847,968,144
5. Step 5: Solve for x
   x = 1,847,968,144/27,688
6. Step 6: Final answer
   x = 66,742.57