Finding the Third Proportional to 384,290 and 574,317.50

Step by Step Solution

1. Step 1: Write the proportion equation
   384,290 : 574,317.50 = 574,317.50 : x
2. Step 2: Convert to fraction form
   384,290/574,317.50 = 574,317.50/x
3. Step 3: Cross multiply
   384,290x = 574,317.50 × 574,317.50
4. Step 4: Simplify right side
   384,290x = 329,840,590,806.25
5. Step 5: Solve for x
   x = 329,840,590,806.25/384,290
6. Step 6: Final answer
   x = 858,311.67