Finding the Fourth Proportional to 10,498.07, 15,698.48 and 8,131.25

Step by Step Solution

1. Step 1: Write the proportion equation
   10,498.07 : 15,698.48 = 8,131.25 : x
2. Step 2: Convert to fraction form
   10,498.07/15,698.48 = 8,131.25/x
3. Step 3: Cross multiply
   10,498.07x = 15,698.48 × 8,131.25
4. Step 4: Simplify right side
   10,498.07x = 127,648,146.35
5. Step 5: Solve for x
   x = 127,648,146.35/10,498.07
6. Step 6: Final answer
   x = 12,159.21