Finding the Third Proportional to 291,282 and 393,538.50

Step by Step Solution

1. Step 1: Write the proportion equation
   291,282 : 393,538.50 = 393,538.50 : x
2. Step 2: Convert to fraction form
   291,282/393,538.50 = 393,538.50/x
3. Step 3: Cross multiply
   291,282x = 393,538.50 × 393,538.50
4. Step 4: Simplify right side
   291,282x = 154,872,550,982.25
5. Step 5: Solve for x
   x = 154,872,550,982.25/291,282
6. Step 6: Final answer
   x = 531,692.83