Finding the Third Proportional to 264,429 and 385,570.50

Step by Step Solution

1. Step 1: Write the proportion equation
   264,429 : 385,570.50 = 385,570.50 : x
2. Step 2: Convert to fraction form
   264,429/385,570.50 = 385,570.50/x
3. Step 3: Cross multiply
   264,429x = 385,570.50 × 385,570.50
4. Step 4: Simplify right side
   264,429x = 148,664,610,470.25
5. Step 5: Solve for x
   x = 148,664,610,470.25/264,429
6. Step 6: Final answer
   x = 562,209.93