Finding the Fourth Proportional to 21,562.15, 29,755.72 and 12,130.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,562.15 : 29,755.72 = 12,130.72 : x
2. Step 2: Convert to fraction form
   21,562.15/29,755.72 = 12,130.72/x
3. Step 3: Cross multiply
   21,562.15x = 29,755.72 × 12,130.72
4. Step 4: Simplify right side
   21,562.15x = 360,958,307.72
5. Step 5: Solve for x
   x = 360,958,307.72/21,562.15
6. Step 6: Final answer
   x = 16,740.37