Finding the Fourth Proportional to 12,400.56, 18,626.28 and 8,190.01

Step by Step Solution

1. Step 1: Write the proportion equation
   12,400.56 : 18,626.28 = 8,190.01 : x
2. Step 2: Convert to fraction form
   12,400.56/18,626.28 = 8,190.01/x
3. Step 3: Cross multiply
   12,400.56x = 18,626.28 × 8,190.01
4. Step 4: Simplify right side
   12,400.56x = 152,549,412.03
5. Step 5: Solve for x
   x = 152,549,412.03/12,400.56
6. Step 6: Final answer
   x = 12,301.82