Finding the Third Proportional to 54,681 and 84,300

Step by Step Solution

1. Step 1: Write the proportion equation
   54,681 : 84,300 = 84,300 : x
2. Step 2: Convert to fraction form
   54,681/84,300 = 84,300/x
3. Step 3: Cross multiply
   54,681x = 84,300 × 84,300
4. Step 4: Simplify right side
   54,681x = 7,106,490,000
5. Step 5: Solve for x
   x = 7,106,490,000/54,681
6. Step 6: Final answer
   x = 129,962.69