Finding the Fourth Proportional to 10,488.38, 15,721.58 and 3,911.91

Step by Step Solution

1. Step 1: Write the proportion equation
   10,488.38 : 15,721.58 = 3,911.91 : x
2. Step 2: Convert to fraction form
   10,488.38/15,721.58 = 3,911.91/x
3. Step 3: Cross multiply
   10,488.38x = 15,721.58 × 3,911.91
4. Step 4: Simplify right side
   10,488.38x = 61,501,386.46
5. Step 5: Solve for x
   x = 61,501,386.46/10,488.38
6. Step 6: Final answer
   x = 5,863.77