Finding the Third Proportional to 58,860 and 90,396

Step by Step Solution

1. Step 1: Write the proportion equation
   58,860 : 90,396 = 90,396 : x
2. Step 2: Convert to fraction form
   58,860/90,396 = 90,396/x
3. Step 3: Cross multiply
   58,860x = 90,396 × 90,396
4. Step 4: Simplify right side
   58,860x = 8,171,436,816
5. Step 5: Solve for x
   x = 8,171,436,816/58,860
6. Step 6: Final answer
   x = 138,828.35