Finding the Third Proportional to 392,553 and 859,666.50

Step by Step Solution

1. Step 1: Write the proportion equation
   392,553 : 859,666.50 = 859,666.50 : x
2. Step 2: Convert to fraction form
   392,553/859,666.50 = 859,666.50/x
3. Step 3: Cross multiply
   392,553x = 859,666.50 × 859,666.50
4. Step 4: Simplify right side
   392,553x = 739,026,491,222.25
5. Step 5: Solve for x
   x = 739,026,491,222.25/392,553
6. Step 6: Final answer
   x = 1,882,615.83