Finding the Third Proportional to 397,680 and 602,311.50

Step by Step Solution

1. Step 1: Write the proportion equation
   397,680 : 602,311.50 = 602,311.50 : x
2. Step 2: Convert to fraction form
   397,680/602,311.50 = 602,311.50/x
3. Step 3: Cross multiply
   397,680x = 602,311.50 × 602,311.50
4. Step 4: Simplify right side
   397,680x = 362,779,143,032.25
5. Step 5: Solve for x
   x = 362,779,143,032.25/397,680
6. Step 6: Final answer
   x = 912,238.84