Finding the Fourth Proportional to 12,420.06, 18,632.37 and 4,100.64

Step by Step Solution

1. Step 1: Write the proportion equation
   12,420.06 : 18,632.37 = 4,100.64 : x
2. Step 2: Convert to fraction form
   12,420.06/18,632.37 = 4,100.64/x
3. Step 3: Cross multiply
   12,420.06x = 18,632.37 × 4,100.64
4. Step 4: Simplify right side
   12,420.06x = 76,404,641.72
5. Step 5: Solve for x
   x = 76,404,641.72/12,420.06
6. Step 6: Final answer
   x = 6,151.71