Finding the Fourth Proportional to 39,928.57, 55,099.56 and 22,921

Step by Step Solution

1. Step 1: Write the proportion equation
   39,928.57 : 55,099.56 = 22,921 : x
2. Step 2: Convert to fraction form
   39,928.57/55,099.56 = 22,921/x
3. Step 3: Cross multiply
   39,928.57x = 55,099.56 × 22,921
4. Step 4: Simplify right side
   39,928.57x = 1,262,937,014.76
5. Step 5: Solve for x
   x = 1,262,937,014.76/39,928.57
6. Step 6: Final answer
   x = 31,629.91