Finding the Third Proportional to 58,890.50 and 128,782

Step by Step Solution

1. Step 1: Write the proportion equation
   58,890.50 : 128,782 = 128,782 : x
2. Step 2: Convert to fraction form
   58,890.50/128,782 = 128,782/x
3. Step 3: Cross multiply
   58,890.50x = 128,782 × 128,782
4. Step 4: Simplify right side
   58,890.50x = 16,584,803,524
5. Step 5: Solve for x
   x = 16,584,803,524/58,890.50
6. Step 6: Final answer
   x = 281,621.03