Finding the Fourth Proportional to 9,123.63, 13,686.53 and 3,198.71

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.63 : 13,686.53 = 3,198.71 : x
2. Step 2: Convert to fraction form
   9,123.63/13,686.53 = 3,198.71/x
3. Step 3: Cross multiply
   9,123.63x = 13,686.53 × 3,198.71
4. Step 4: Simplify right side
   9,123.63x = 43,779,155.95
5. Step 5: Solve for x
   x = 43,779,155.95/9,123.63
6. Step 6: Final answer
   x = 4,798.44