Finding the Fourth Proportional to 38,667.30, 53,365.30 and 21,676.13

Step by Step Solution

1. Step 1: Write the proportion equation
   38,667.30 : 53,365.30 = 21,676.13 : x
2. Step 2: Convert to fraction form
   38,667.30/53,365.30 = 21,676.13/x
3. Step 3: Cross multiply
   38,667.30x = 53,365.30 × 21,676.13
4. Step 4: Simplify right side
   38,667.30x = 1,156,753,071.91
5. Step 5: Solve for x
   x = 1,156,753,071.91/38,667.30
6. Step 6: Final answer
   x = 29,915.54