Finding the Fourth Proportional to 12,987, 17,923.82 and 7,322.91

Step by Step Solution

1. Step 1: Write the proportion equation
   12,987 : 17,923.82 = 7,322.91 : x
2. Step 2: Convert to fraction form
   12,987/17,923.82 = 7,322.91/x
3. Step 3: Cross multiply
   12,987x = 17,923.82 × 7,322.91
4. Step 4: Simplify right side
   12,987x = 131,254,416.89
5. Step 5: Solve for x
   x = 131,254,416.89/12,987
6. Step 6: Final answer
   x = 10,106.60