Finding the Fourth Proportional to 12,906.64, 17,810.94 and 7,241.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,906.64 : 17,810.94 = 7,241.50 : x
2. Step 2: Convert to fraction form
   12,906.64/17,810.94 = 7,241.50/x
3. Step 3: Cross multiply
   12,906.64x = 17,810.94 × 7,241.50
4. Step 4: Simplify right side
   12,906.64x = 128,977,922.01
5. Step 5: Solve for x
   x = 128,977,922.01/12,906.64
6. Step 6: Final answer
   x = 9,993.14