Finding the Fourth Proportional to 21,054.49, 31,581.89 and 14,460.69

Step by Step Solution

1. Step 1: Write the proportion equation
   21,054.49 : 31,581.89 = 14,460.69 : x
2. Step 2: Convert to fraction form
   21,054.49/31,581.89 = 14,460.69/x
3. Step 3: Cross multiply
   21,054.49x = 31,581.89 × 14,460.69
4. Step 4: Simplify right side
   21,054.49x = 456,695,920.90
5. Step 5: Solve for x
   x = 456,695,920.90/21,054.49
6. Step 6: Final answer
   x = 21,691.14