Finding the Fourth Proportional to 10,488.57, 15,730.83 and 3,091.25

Step by Step Solution

1. Step 1: Write the proportion equation
   10,488.57 : 15,730.83 = 3,091.25 : x
2. Step 2: Convert to fraction form
   10,488.57/15,730.83 = 3,091.25/x
3. Step 3: Cross multiply
   10,488.57x = 15,730.83 × 3,091.25
4. Step 4: Simplify right side
   10,488.57x = 48,627,849.58
5. Step 5: Solve for x
   x = 48,627,849.58/10,488.57
6. Step 6: Final answer
   x = 4,636.27