Finding the Third Proportional to 136,507 and 215,848

Step by Step Solution

1. Step 1: Write the proportion equation
   136,507 : 215,848 = 215,848 : x
2. Step 2: Convert to fraction form
   136,507/215,848 = 215,848/x
3. Step 3: Cross multiply
   136,507x = 215,848 × 215,848
4. Step 4: Simplify right side
   136,507x = 46,590,359,104
5. Step 5: Solve for x
   x = 46,590,359,104/136,507
6. Step 6: Final answer
   x = 341,303.81