Finding the Third Proportional to 30,888 and 67,440

Step by Step Solution

1. Step 1: Write the proportion equation
   30,888 : 67,440 = 67,440 : x
2. Step 2: Convert to fraction form
   30,888/67,440 = 67,440/x
3. Step 3: Cross multiply
   30,888x = 67,440 × 67,440
4. Step 4: Simplify right side
   30,888x = 4,548,153,600
5. Step 5: Solve for x
   x = 4,548,153,600/30,888
6. Step 6: Final answer
   x = 147,246.62