Finding the Fourth Proportional to 20,410.72, 30,623.84 and 10,543.84

Step by Step Solution

1. Step 1: Write the proportion equation
   20,410.72 : 30,623.84 = 10,543.84 : x
2. Step 2: Convert to fraction form
   20,410.72/30,623.84 = 10,543.84/x
3. Step 3: Cross multiply
   20,410.72x = 30,623.84 × 10,543.84
4. Step 4: Simplify right side
   20,410.72x = 322,892,869.15
5. Step 5: Solve for x
   x = 322,892,869.15/20,410.72
6. Step 6: Final answer
   x = 15,819.77