Finding the Fourth Proportional to 12,458.28, 18,687.38 and 3,692.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,458.28 : 18,687.38 = 3,692.50 : x
2. Step 2: Convert to fraction form
   12,458.28/18,687.38 = 3,692.50/x
3. Step 3: Cross multiply
   12,458.28x = 18,687.38 × 3,692.50
4. Step 4: Simplify right side
   12,458.28x = 69,003,150.65
5. Step 5: Solve for x
   x = 69,003,150.65/12,458.28
6. Step 6: Final answer
   x = 5,538.74