Finding the Fourth Proportional to 12,907.45, 17,810.84 and 7,241.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,907.45 : 17,810.84 = 7,241.02 : x
2. Step 2: Convert to fraction form
   12,907.45/17,810.84 = 7,241.02/x
3. Step 3: Cross multiply
   12,907.45x = 17,810.84 × 7,241.02
4. Step 4: Simplify right side
   12,907.45x = 128,968,631.59
5. Step 5: Solve for x
   x = 128,968,631.59/12,907.45
6. Step 6: Final answer
   x = 9,991.80