Finding the Third Proportional to 535,545 and 820,312.50

Step by Step Solution

1. Step 1: Write the proportion equation
   535,545 : 820,312.50 = 820,312.50 : x
2. Step 2: Convert to fraction form
   535,545/820,312.50 = 820,312.50/x
3. Step 3: Cross multiply
   535,545x = 820,312.50 × 820,312.50
4. Step 4: Simplify right side
   535,545x = 672,912,597,656.25
5. Step 5: Solve for x
   x = 672,912,597,656.25/535,545
6. Step 6: Final answer
   x = 1,256,500.57