Finding the Third Proportional to 58,530 and 128,212.50

Step by Step Solution

1. Step 1: Write the proportion equation
   58,530 : 128,212.50 = 128,212.50 : x
2. Step 2: Convert to fraction form
   58,530/128,212.50 = 128,212.50/x
3. Step 3: Cross multiply
   58,530x = 128,212.50 × 128,212.50
4. Step 4: Simplify right side
   58,530x = 16,438,445,156.25
5. Step 5: Solve for x
   x = 16,438,445,156.25/58,530
6. Step 6: Final answer
   x = 280,855.03