Finding the Third Proportional to 139,140 and 304,536

Step by Step Solution

1. Step 1: Write the proportion equation
   139,140 : 304,536 = 304,536 : x
2. Step 2: Convert to fraction form
   139,140/304,536 = 304,536/x
3. Step 3: Cross multiply
   139,140x = 304,536 × 304,536
4. Step 4: Simplify right side
   139,140x = 92,742,175,296
5. Step 5: Solve for x
   x = 92,742,175,296/139,140
6. Step 6: Final answer
   x = 666,538.56