Finding the Third Proportional to 139,053 and 208,584

Step by Step Solution

1. Step 1: Write the proportion equation
   139,053 : 208,584 = 208,584 : x
2. Step 2: Convert to fraction form
   139,053/208,584 = 208,584/x
3. Step 3: Cross multiply
   139,053x = 208,584 × 208,584
4. Step 4: Simplify right side
   139,053x = 43,507,285,056
5. Step 5: Solve for x
   x = 43,507,285,056/139,053
6. Step 6: Final answer
   x = 312,882.75