Finding the Fourth Proportional to 38,500.82, 53,130.56 and 21,505.30

Step by Step Solution

1. Step 1: Write the proportion equation
   38,500.82 : 53,130.56 = 21,505.30 : x
2. Step 2: Convert to fraction form
   38,500.82/53,130.56 = 21,505.30/x
3. Step 3: Cross multiply
   38,500.82x = 53,130.56 × 21,505.30
4. Step 4: Simplify right side
   38,500.82x = 1,142,588,631.97
5. Step 5: Solve for x
   x = 1,142,588,631.97/38,500.82
6. Step 6: Final answer
   x = 29,676.99