Finding the Third Proportional to 245,727 and 385,539.75

Step by Step Solution

1. Step 1: Write the proportion equation
   245,727 : 385,539.75 = 385,539.75 : x
2. Step 2: Convert to fraction form
   245,727/385,539.75 = 385,539.75/x
3. Step 3: Cross multiply
   245,727x = 385,539.75 × 385,539.75
4. Step 4: Simplify right side
   245,727x = 148,640,898,830.06
5. Step 5: Solve for x
   x = 148,640,898,830.06/245,727
6. Step 6: Final answer
   x = 604,902.59