Finding the Fourth Proportional to 38,478.72, 53,101.46 and 21,251.04

Step by Step Solution

1. Step 1: Write the proportion equation
   38,478.72 : 53,101.46 = 21,251.04 : x
2. Step 2: Convert to fraction form
   38,478.72/53,101.46 = 21,251.04/x
3. Step 3: Cross multiply
   38,478.72x = 53,101.46 × 21,251.04
4. Step 4: Simplify right side
   38,478.72x = 1,128,461,250.52
5. Step 5: Solve for x
   x = 1,128,461,250.52/38,478.72
6. Step 6: Final answer
   x = 29,326.89