Finding the Third Proportional to 516,912 and 755,317.50

Step by Step Solution

1. Step 1: Write the proportion equation
   516,912 : 755,317.50 = 755,317.50 : x
2. Step 2: Convert to fraction form
   516,912/755,317.50 = 755,317.50/x
3. Step 3: Cross multiply
   516,912x = 755,317.50 × 755,317.50
4. Step 4: Simplify right side
   516,912x = 570,504,525,806.25
5. Step 5: Solve for x
   x = 570,504,525,806.25/516,912
6. Step 6: Final answer
   x = 1,103,678.24