Finding the Fourth Proportional to 38,500.08, 53,129.56 and 21,504.57

Step by Step Solution

1. Step 1: Write the proportion equation
   38,500.08 : 53,129.56 = 21,504.57 : x
2. Step 2: Convert to fraction form
   38,500.08/53,129.56 = 21,504.57/x
3. Step 3: Cross multiply
   38,500.08x = 53,129.56 × 21,504.57
4. Step 4: Simplify right side
   38,500.08x = 1,142,528,288.33
5. Step 5: Solve for x
   x = 1,142,528,288.33/38,500.08
6. Step 6: Final answer
   x = 29,675.99