Finding the Third Proportional to 156,442.50 and 343,980

Step by Step Solution

1. Step 1: Write the proportion equation
   156,442.50 : 343,980 = 343,980 : x
2. Step 2: Convert to fraction form
   156,442.50/343,980 = 343,980/x
3. Step 3: Cross multiply
   156,442.50x = 343,980 × 343,980
4. Step 4: Simplify right side
   156,442.50x = 118,322,240,400
5. Step 5: Solve for x
   x = 118,322,240,400/156,442.50
6. Step 6: Final answer
   x = 756,330.54