Finding the Third Proportional to 58,357.50 and 128,061.75

Step by Step Solution

1. Step 1: Write the proportion equation
   58,357.50 : 128,061.75 = 128,061.75 : x
2. Step 2: Convert to fraction form
   58,357.50/128,061.75 = 128,061.75/x
3. Step 3: Cross multiply
   58,357.50x = 128,061.75 × 128,061.75
4. Step 4: Simplify right side
   58,357.50x = 16,399,811,813.06
5. Step 5: Solve for x
   x = 16,399,811,813.06/58,357.50
6. Step 6: Final answer
   x = 281,023.21