Finding the Fourth Proportional to 12,905.34, 17,810.71 and 7,241.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,905.34 : 17,810.71 = 7,241.61 : x
2. Step 2: Convert to fraction form
   12,905.34/17,810.71 = 7,241.61/x
3. Step 3: Cross multiply
   12,905.34x = 17,810.71 × 7,241.61
4. Step 4: Simplify right side
   12,905.34x = 128,978,215.64
5. Step 5: Solve for x
   x = 128,978,215.64/12,905.34
6. Step 6: Final answer
   x = 9,994.18