Finding the Fourth Proportional to 39,984.54, 59,971.23 and 21,978.42

Step by Step Solution

1. Step 1: Write the proportion equation
   39,984.54 : 59,971.23 = 21,978.42 : x
2. Step 2: Convert to fraction form
   39,984.54/59,971.23 = 21,978.42/x
3. Step 3: Cross multiply
   39,984.54x = 59,971.23 × 21,978.42
4. Step 4: Simplify right side
   39,984.54x = 1,318,072,880.86
5. Step 5: Solve for x
   x = 1,318,072,880.86/39,984.54
6. Step 6: Final answer
   x = 32,964.56