Finding the Fourth Proportional to 39,044, 53,880.72 and 21,380

Step by Step Solution

1. Step 1: Write the proportion equation
   39,044 : 53,880.72 = 21,380 : x
2. Step 2: Convert to fraction form
   39,044/53,880.72 = 21,380/x
3. Step 3: Cross multiply
   39,044x = 53,880.72 × 21,380
4. Step 4: Simplify right side
   39,044x = 1,151,969,793.60
5. Step 5: Solve for x
   x = 1,151,969,793.60/39,044
6. Step 6: Final answer
   x = 29,504.40