Finding the Third Proportional to 129,672 and 305,300

Step by Step Solution

1. Step 1: Write the proportion equation
   129,672 : 305,300 = 305,300 : x
2. Step 2: Convert to fraction form
   129,672/305,300 = 305,300/x
3. Step 3: Cross multiply
   129,672x = 305,300 × 305,300
4. Step 4: Simplify right side
   129,672x = 93,208,090,000
5. Step 5: Solve for x
   x = 93,208,090,000/129,672
6. Step 6: Final answer
   x = 718,798.89