Finding the Third Proportional to 136,789 and 218,523.75

Step by Step Solution

1. Step 1: Write the proportion equation
   136,789 : 218,523.75 = 218,523.75 : x
2. Step 2: Convert to fraction form
   136,789/218,523.75 = 218,523.75/x
3. Step 3: Cross multiply
   136,789x = 218,523.75 × 218,523.75
4. Step 4: Simplify right side
   136,789x = 47,752,629,314.06
5. Step 5: Solve for x
   x = 47,752,629,314.06/136,789
6. Step 6: Final answer
   x = 349,097.00