Finding the Third Proportional to 139,113 and 208,700

Step by Step Solution

1. Step 1: Write the proportion equation
   139,113 : 208,700 = 208,700 : x
2. Step 2: Convert to fraction form
   139,113/208,700 = 208,700/x
3. Step 3: Cross multiply
   139,113x = 208,700 × 208,700
4. Step 4: Simplify right side
   139,113x = 43,555,690,000
5. Step 5: Solve for x
   x = 43,555,690,000/139,113
6. Step 6: Final answer
   x = 313,095.76