Finding the Fourth Proportional to 21,158.34, 31,742.16 and 8,010.81

Step by Step Solution

1. Step 1: Write the proportion equation
   21,158.34 : 31,742.16 = 8,010.81 : x
2. Step 2: Convert to fraction form
   21,158.34/31,742.16 = 8,010.81/x
3. Step 3: Cross multiply
   21,158.34x = 31,742.16 × 8,010.81
4. Step 4: Simplify right side
   21,158.34x = 254,280,412.75
5. Step 5: Solve for x
   x = 254,280,412.75/21,158.34
6. Step 6: Final answer
   x = 12,017.98