Finding the Third Proportional to 390,541.50 and 855,987

Step by Step Solution

1. Step 1: Write the proportion equation
   390,541.50 : 855,987 = 855,987 : x
2. Step 2: Convert to fraction form
   390,541.50/855,987 = 855,987/x
3. Step 3: Cross multiply
   390,541.50x = 855,987 × 855,987
4. Step 4: Simplify right side
   390,541.50x = 732,713,744,169
5. Step 5: Solve for x
   x = 732,713,744,169/390,541.50
6. Step 6: Final answer
   x = 1,876,148.23