Finding the Fourth Proportional to 21,802.08, 30,088.56 and 12,371.04

Step by Step Solution

1. Step 1: Write the proportion equation
   21,802.08 : 30,088.56 = 12,371.04 : x
2. Step 2: Convert to fraction form
   21,802.08/30,088.56 = 12,371.04/x
3. Step 3: Cross multiply
   21,802.08x = 30,088.56 × 12,371.04
4. Step 4: Simplify right side
   21,802.08x = 372,226,779.30
5. Step 5: Solve for x
   x = 372,226,779.30/21,802.08
6. Step 6: Final answer
   x = 17,072.99