Finding the Third Proportional to 58,448 and 90,400

Step by Step Solution

1. Step 1: Write the proportion equation
   58,448 : 90,400 = 90,400 : x
2. Step 2: Convert to fraction form
   58,448/90,400 = 90,400/x
3. Step 3: Cross multiply
   58,448x = 90,400 × 90,400
4. Step 4: Simplify right side
   58,448x = 8,172,160,000
5. Step 5: Solve for x
   x = 8,172,160,000/58,448
6. Step 6: Final answer
   x = 139,819.33