Finding the Third Proportional to 92,390 and 139,417

Step by Step Solution

1. Step 1: Write the proportion equation
   92,390 : 139,417 = 139,417 : x
2. Step 2: Convert to fraction form
   92,390/139,417 = 139,417/x
3. Step 3: Cross multiply
   92,390x = 139,417 × 139,417
4. Step 4: Simplify right side
   92,390x = 19,437,099,889
5. Step 5: Solve for x
   x = 19,437,099,889/92,390
6. Step 6: Final answer
   x = 210,380.99