Finding the Third Proportional to 508,700 and 787,317.25

Step by Step Solution

1. Step 1: Write the proportion equation
   508,700 : 787,317.25 = 787,317.25 : x
2. Step 2: Convert to fraction form
   508,700/787,317.25 = 787,317.25/x
3. Step 3: Cross multiply
   508,700x = 787,317.25 × 787,317.25
4. Step 4: Simplify right side
   508,700x = 619,868,452,147.56
5. Step 5: Solve for x
   x = 619,868,452,147.56/508,700
6. Step 6: Final answer
   x = 1,218,534.41