Finding the Third Proportional to 139,927.50 and 304,681.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,927.50 : 304,681.50 = 304,681.50 : x
2. Step 2: Convert to fraction form
   139,927.50/304,681.50 = 304,681.50/x
3. Step 3: Cross multiply
   139,927.50x = 304,681.50 × 304,681.50
4. Step 4: Simplify right side
   139,927.50x = 92,830,816,442.25
5. Step 5: Solve for x
   x = 92,830,816,442.25/139,927.50
6. Step 6: Final answer
   x = 663,420.82