Finding the Third Proportional to 300,784.50 and 401,388.75

Step by Step Solution

1. Step 1: Write the proportion equation
   300,784.50 : 401,388.75 = 401,388.75 : x
2. Step 2: Convert to fraction form
   300,784.50/401,388.75 = 401,388.75/x
3. Step 3: Cross multiply
   300,784.50x = 401,388.75 × 401,388.75
4. Step 4: Simplify right side
   300,784.50x = 161,112,928,626.56
5. Step 5: Solve for x
   x = 161,112,928,626.56/300,784.50
6. Step 6: Final answer
   x = 535,642.39