Finding the Fourth Proportional to 13,374.72, 18,457.37 and 7,406.54

Step by Step Solution

1. Step 1: Write the proportion equation
   13,374.72 : 18,457.37 = 7,406.54 : x
2. Step 2: Convert to fraction form
   13,374.72/18,457.37 = 7,406.54/x
3. Step 3: Cross multiply
   13,374.72x = 18,457.37 × 7,406.54
4. Step 4: Simplify right side
   13,374.72x = 136,705,216.87
5. Step 5: Solve for x
   x = 136,705,216.87/13,374.72
6. Step 6: Final answer
   x = 10,221.16