Finding the Third Proportional to 402,808.50 and 877,518

Step by Step Solution

1. Step 1: Write the proportion equation
   402,808.50 : 877,518 = 877,518 : x
2. Step 2: Convert to fraction form
   402,808.50/877,518 = 877,518/x
3. Step 3: Cross multiply
   402,808.50x = 877,518 × 877,518
4. Step 4: Simplify right side
   402,808.50x = 770,037,840,324
5. Step 5: Solve for x
   x = 770,037,840,324/402,808.50
6. Step 6: Final answer
   x = 1,911,672.27