Finding the Fourth Proportional to 1,442,112, 2,163,173.76 and 391,488

Step by Step Solution

1. Step 1: Write the proportion equation
   1,442,112 : 2,163,173.76 = 391,488 : x
2. Step 2: Convert to fraction form
   1,442,112/2,163,173.76 = 391,488/x
3. Step 3: Cross multiply
   1,442,112x = 2,163,173.76 × 391,488
4. Step 4: Simplify right side
   1,442,112x = 846,856,568,954.88
5. Step 5: Solve for x
   x = 846,856,568,954.88/1,442,112
6. Step 6: Final answer
   x = 587,233.56