Finding the Third Proportional to 39,643 and 58,390

Step by Step Solution

1. Step 1: Write the proportion equation
   39,643 : 58,390 = 58,390 : x
2. Step 2: Convert to fraction form
   39,643/58,390 = 58,390/x
3. Step 3: Cross multiply
   39,643x = 58,390 × 58,390
4. Step 4: Simplify right side
   39,643x = 3,409,392,100
5. Step 5: Solve for x
   x = 3,409,392,100/39,643
6. Step 6: Final answer
   x = 86,002.37