Finding the Third Proportional to 139,300.50 and 209,964

Step by Step Solution

1. Step 1: Write the proportion equation
   139,300.50 : 209,964 = 209,964 : x
2. Step 2: Convert to fraction form
   139,300.50/209,964 = 209,964/x
3. Step 3: Cross multiply
   139,300.50x = 209,964 × 209,964
4. Step 4: Simplify right side
   139,300.50x = 44,084,881,296
5. Step 5: Solve for x
   x = 44,084,881,296/139,300.50
6. Step 6: Final answer
   x = 316,473.25