Finding the Fourth Proportional to 22,931.47, 31,643.94 and 12,859.84

Step by Step Solution

1. Step 1: Write the proportion equation
   22,931.47 : 31,643.94 = 12,859.84 : x
2. Step 2: Convert to fraction form
   22,931.47/31,643.94 = 12,859.84/x
3. Step 3: Cross multiply
   22,931.47x = 31,643.94 × 12,859.84
4. Step 4: Simplify right side
   22,931.47x = 406,936,005.37
5. Step 5: Solve for x
   x = 406,936,005.37/22,931.47
6. Step 6: Final answer
   x = 17,745.74