Finding the Fourth Proportional to 38,499.33, 53,128.51 and 21,503.88

Step by Step Solution

1. Step 1: Write the proportion equation
   38,499.33 : 53,128.51 = 21,503.88 : x
2. Step 2: Convert to fraction form
   38,499.33/53,128.51 = 21,503.88/x
3. Step 3: Cross multiply
   38,499.33x = 53,128.51 × 21,503.88
4. Step 4: Simplify right side
   38,499.33x = 1,142,469,049.86
5. Step 5: Solve for x
   x = 1,142,469,049.86/38,499.33
6. Step 6: Final answer
   x = 29,675.03