Finding the Third Proportional to 139,092 and 208,543

Step by Step Solution

1. Step 1: Write the proportion equation
   139,092 : 208,543 = 208,543 : x
2. Step 2: Convert to fraction form
   139,092/208,543 = 208,543/x
3. Step 3: Cross multiply
   139,092x = 208,543 × 208,543
4. Step 4: Simplify right side
   139,092x = 43,490,182,849
5. Step 5: Solve for x
   x = 43,490,182,849/139,092
6. Step 6: Final answer
   x = 312,672.06