Finding the Third Proportional to 85,377.38 and 137,178.56

Step by Step Solution

1. Step 1: Write the proportion equation
   85,377.38 : 137,178.56 = 137,178.56 : x
2. Step 2: Convert to fraction form
   85,377.38/137,178.56 = 137,178.56/x
3. Step 3: Cross multiply
   85,377.38x = 137,178.56 × 137,178.56
4. Step 4: Simplify right side
   85,377.38x = 18,817,958,009.57
5. Step 5: Solve for x
   x = 18,817,958,009.57/85,377.38
6. Step 6: Final answer
   x = 220,409.19