Finding the Third Proportional to 534,385 and 852,121.50

Step by Step Solution

1. Step 1: Write the proportion equation
   534,385 : 852,121.50 = 852,121.50 : x
2. Step 2: Convert to fraction form
   534,385/852,121.50 = 852,121.50/x
3. Step 3: Cross multiply
   534,385x = 852,121.50 × 852,121.50
4. Step 4: Simplify right side
   534,385x = 726,111,050,762.25
5. Step 5: Solve for x
   x = 726,111,050,762.25/534,385
6. Step 6: Final answer
   x = 1,358,778.88