Finding the Third Proportional to 86,712 and 187,248

Step by Step Solution

1. Step 1: Write the proportion equation
   86,712 : 187,248 = 187,248 : x
2. Step 2: Convert to fraction form
   86,712/187,248 = 187,248/x
3. Step 3: Cross multiply
   86,712x = 187,248 × 187,248
4. Step 4: Simplify right side
   86,712x = 35,061,813,504
5. Step 5: Solve for x
   x = 35,061,813,504/86,712
6. Step 6: Final answer
   x = 404,347.88