Finding the Third Proportional to 139,779 and 301,691.25

Step by Step Solution

1. Step 1: Write the proportion equation
   139,779 : 301,691.25 = 301,691.25 : x
2. Step 2: Convert to fraction form
   139,779/301,691.25 = 301,691.25/x
3. Step 3: Cross multiply
   139,779x = 301,691.25 × 301,691.25
4. Step 4: Simplify right side
   139,779x = 91,017,610,326.56
5. Step 5: Solve for x
   x = 91,017,610,326.56/139,779
6. Step 6: Final answer
   x = 651,153.68