Finding the Third Proportional to 291,270 and 393,523.50

Step by Step Solution

1. Step 1: Write the proportion equation
   291,270 : 393,523.50 = 393,523.50 : x
2. Step 2: Convert to fraction form
   291,270/393,523.50 = 393,523.50/x
3. Step 3: Cross multiply
   291,270x = 393,523.50 × 393,523.50
4. Step 4: Simplify right side
   291,270x = 154,860,745,052.25
5. Step 5: Solve for x
   x = 154,860,745,052.25/291,270
6. Step 6: Final answer
   x = 531,674.20