Finding the Fourth Proportional to 10,590.72, 15,869.37 and 3,918.06

Step by Step Solution

1. Step 1: Write the proportion equation
   10,590.72 : 15,869.37 = 3,918.06 : x
2. Step 2: Convert to fraction form
   10,590.72/15,869.37 = 3,918.06/x
3. Step 3: Cross multiply
   10,590.72x = 15,869.37 × 3,918.06
4. Step 4: Simplify right side
   10,590.72x = 62,177,143.82
5. Step 5: Solve for x
   x = 62,177,143.82/10,590.72
6. Step 6: Final answer
   x = 5,870.91