Finding the Fourth Proportional to 39,978, 55,174.50 and 23,211

Step by Step Solution

1. Step 1: Write the proportion equation
   39,978 : 55,174.50 = 23,211 : x
2. Step 2: Convert to fraction form
   39,978/55,174.50 = 23,211/x
3. Step 3: Cross multiply
   39,978x = 55,174.50 × 23,211
4. Step 4: Simplify right side
   39,978x = 1,280,655,319.50
5. Step 5: Solve for x
   x = 1,280,655,319.50/39,978
6. Step 6: Final answer
   x = 32,034.00