Finding the Fourth Proportional to 15,664.74, 23,451.98 and 10,405

Step by Step Solution

1. Step 1: Write the proportion equation
   15,664.74 : 23,451.98 = 10,405 : x
2. Step 2: Convert to fraction form
   15,664.74/23,451.98 = 10,405/x
3. Step 3: Cross multiply
   15,664.74x = 23,451.98 × 10,405
4. Step 4: Simplify right side
   15,664.74x = 244,017,799.88
5. Step 5: Solve for x
   x = 244,017,799.88/15,664.74
6. Step 6: Final answer
   x = 15,577.52