Finding the Third Proportional to 118,321.50 and 172,080

Step by Step Solution

1. Step 1: Write the proportion equation
   118,321.50 : 172,080 = 172,080 : x
2. Step 2: Convert to fraction form
   118,321.50/172,080 = 172,080/x
3. Step 3: Cross multiply
   118,321.50x = 172,080 × 172,080
4. Step 4: Simplify right side
   118,321.50x = 29,611,526,400
5. Step 5: Solve for x
   x = 29,611,526,400/118,321.50
6. Step 6: Final answer
   x = 250,263.28