Finding the Fourth Proportional to 10,498.68, 15,756.12 and 3,931.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,498.68 : 15,756.12 = 3,931.20 : x
2. Step 2: Convert to fraction form
   10,498.68/15,756.12 = 3,931.20/x
3. Step 3: Cross multiply
   10,498.68x = 15,756.12 × 3,931.20
4. Step 4: Simplify right side
   10,498.68x = 61,940,458.94
5. Step 5: Solve for x
   x = 61,940,458.94/10,498.68
6. Step 6: Final answer
   x = 5,899.83