Finding the Fourth Proportional to 39,978.50, 55,175.19 and 23,211.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39,978.50 : 55,175.19 = 23,211.50 : x
2. Step 2: Convert to fraction form
   39,978.50/55,175.19 = 23,211.50/x
3. Step 3: Cross multiply
   39,978.50x = 55,175.19 × 23,211.50
4. Step 4: Simplify right side
   39,978.50x = 1,280,698,922.69
5. Step 5: Solve for x
   x = 1,280,698,922.69/39,978.50
6. Step 6: Final answer
   x = 32,034.69