Finding the Fourth Proportional to 10,290.57, 15,435.71 and 2,499.45

Step by Step Solution

1. Step 1: Write the proportion equation
   10,290.57 : 15,435.71 = 2,499.45 : x
2. Step 2: Convert to fraction form
   10,290.57/15,435.71 = 2,499.45/x
3. Step 3: Cross multiply
   10,290.57x = 15,435.71 × 2,499.45
4. Step 4: Simplify right side
   10,290.57x = 38,580,785.36
5. Step 5: Solve for x
   x = 38,580,785.36/10,290.57
6. Step 6: Final answer
   x = 3,749.14