Finding the Third Proportional to 58,570 and 128,426

Step by Step Solution

1. Step 1: Write the proportion equation
   58,570 : 128,426 = 128,426 : x
2. Step 2: Convert to fraction form
   58,570/128,426 = 128,426/x
3. Step 3: Cross multiply
   58,570x = 128,426 × 128,426
4. Step 4: Simplify right side
   58,570x = 16,493,237,476
5. Step 5: Solve for x
   x = 16,493,237,476/58,570
6. Step 6: Final answer
   x = 281,598.73