Finding the Fourth Proportional to 16,692.64, 23,035.86 and 10,405

Step by Step Solution

1. Step 1: Write the proportion equation
   16,692.64 : 23,035.86 = 10,405 : x
2. Step 2: Convert to fraction form
   16,692.64/23,035.86 = 10,405/x
3. Step 3: Cross multiply
   16,692.64x = 23,035.86 × 10,405
4. Step 4: Simplify right side
   16,692.64x = 239,688,123.30
5. Step 5: Solve for x
   x = 239,688,123.30/16,692.64
6. Step 6: Final answer
   x = 14,358.91