Finding the Fourth Proportional to 21,925.31, 30,254.60 and 12,973.19

Step by Step Solution

1. Step 1: Write the proportion equation
   21,925.31 : 30,254.60 = 12,973.19 : x
2. Step 2: Convert to fraction form
   21,925.31/30,254.60 = 12,973.19/x
3. Step 3: Cross multiply
   21,925.31x = 30,254.60 × 12,973.19
4. Step 4: Simplify right side
   21,925.31x = 392,498,609.31
5. Step 5: Solve for x
   x = 392,498,609.31/21,925.31
6. Step 6: Final answer
   x = 17,901.62