Finding the Third Proportional to 289,782 and 443,275.88

Step by Step Solution

1. Step 1: Write the proportion equation
   289,782 : 443,275.88 = 443,275.88 : x
2. Step 2: Convert to fraction form
   289,782/443,275.88 = 443,275.88/x
3. Step 3: Cross multiply
   289,782x = 443,275.88 × 443,275.88
4. Step 4: Simplify right side
   289,782x = 196,493,501,357.02
5. Step 5: Solve for x
   x = 196,493,501,357.02/289,782
6. Step 6: Final answer
   x = 678,073.52