Finding the Third Proportional to 402,835.50 and 847,143

Step by Step Solution

1. Step 1: Write the proportion equation
   402,835.50 : 847,143 = 847,143 : x
2. Step 2: Convert to fraction form
   402,835.50/847,143 = 847,143/x
3. Step 3: Cross multiply
   402,835.50x = 847,143 × 847,143
4. Step 4: Simplify right side
   402,835.50x = 717,651,262,449
5. Step 5: Solve for x
   x = 717,651,262,449/402,835.50
6. Step 6: Final answer
   x = 1,781,499.55