Finding the Third Proportional to 60,428.50 and 129,602

Step by Step Solution

1. Step 1: Write the proportion equation
   60,428.50 : 129,602 = 129,602 : x
2. Step 2: Convert to fraction form
   60,428.50/129,602 = 129,602/x
3. Step 3: Cross multiply
   60,428.50x = 129,602 × 129,602
4. Step 4: Simplify right side
   60,428.50x = 16,796,678,404
5. Step 5: Solve for x
   x = 16,796,678,404/60,428.50
6. Step 6: Final answer
   x = 277,959.55