Finding the Fourth Proportional to 2,953.86, 4,430.72 and 1,198.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,953.86 : 4,430.72 = 1,198.40 : x
2. Step 2: Convert to fraction form
   2,953.86/4,430.72 = 1,198.40/x
3. Step 3: Cross multiply
   2,953.86x = 4,430.72 × 1,198.40
4. Step 4: Simplify right side
   2,953.86x = 5,309,746.70
5. Step 5: Solve for x
   x = 5,309,746.70/2,953.86
6. Step 6: Final answer
   x = 1,797.56