Finding the Third Proportional to 58,398 and 89,310

Step by Step Solution

1. Step 1: Write the proportion equation
   58,398 : 89,310 = 89,310 : x
2. Step 2: Convert to fraction form
   58,398/89,310 = 89,310/x
3. Step 3: Cross multiply
   58,398x = 89,310 × 89,310
4. Step 4: Simplify right side
   58,398x = 7,976,276,100
5. Step 5: Solve for x
   x = 7,976,276,100/58,398
6. Step 6: Final answer
   x = 136,584.75