Finding the Fourth Proportional to 22,942, 31,722.28 and 19,989.52

Step by Step Solution

1. Step 1: Write the proportion equation
   22,942 : 31,722.28 = 19,989.52 : x
2. Step 2: Convert to fraction form
   22,942/31,722.28 = 19,989.52/x
3. Step 3: Cross multiply
   22,942x = 31,722.28 × 19,989.52
4. Step 4: Simplify right side
   22,942x = 634,113,150.51
5. Step 5: Solve for x
   x = 634,113,150.51/22,942
6. Step 6: Final answer
   x = 27,639.84