Finding the Third Proportional to 139,410 and 215,412.75

Step by Step Solution

1. Step 1: Write the proportion equation
   139,410 : 215,412.75 = 215,412.75 : x
2. Step 2: Convert to fraction form
   139,410/215,412.75 = 215,412.75/x
3. Step 3: Cross multiply
   139,410x = 215,412.75 × 215,412.75
4. Step 4: Simplify right side
   139,410x = 46,402,652,862.56
5. Step 5: Solve for x
   x = 46,402,652,862.56/139,410
6. Step 6: Final answer
   x = 332,850.25