Finding the Fourth Proportional to 13,262.95, 19,891.61 and 3,900.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,262.95 : 19,891.61 = 3,900.42 : x
2. Step 2: Convert to fraction form
   13,262.95/19,891.61 = 3,900.42/x
3. Step 3: Cross multiply
   13,262.95x = 19,891.61 × 3,900.42
4. Step 4: Simplify right side
   13,262.95x = 77,585,633.48
5. Step 5: Solve for x
   x = 77,585,633.48/13,262.95
6. Step 6: Final answer
   x = 5,849.80