Finding the Third Proportional to 139,961 and 215,146

Step by Step Solution

1. Step 1: Write the proportion equation
   139,961 : 215,146 = 215,146 : x
2. Step 2: Convert to fraction form
   139,961/215,146 = 215,146/x
3. Step 3: Cross multiply
   139,961x = 215,146 × 215,146
4. Step 4: Simplify right side
   139,961x = 46,287,801,316
5. Step 5: Solve for x
   x = 46,287,801,316/139,961
6. Step 6: Final answer
   x = 330,719.28