Finding the Third Proportional to 552,420 and 853,051.50

Step by Step Solution

1. Step 1: Write the proportion equation
   552,420 : 853,051.50 = 853,051.50 : x
2. Step 2: Convert to fraction form
   552,420/853,051.50 = 853,051.50/x
3. Step 3: Cross multiply
   552,420x = 853,051.50 × 853,051.50
4. Step 4: Simplify right side
   552,420x = 727,696,861,652.25
5. Step 5: Solve for x
   x = 727,696,861,652.25/552,420
6. Step 6: Final answer
   x = 1,317,289.13