Finding the Fourth Proportional to 12,395.53, 17,100.88 and 7,918.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,395.53 : 17,100.88 = 7,918.12 : x
2. Step 2: Convert to fraction form
   12,395.53/17,100.88 = 7,918.12/x
3. Step 3: Cross multiply
   12,395.53x = 17,100.88 × 7,918.12
4. Step 4: Simplify right side
   12,395.53x = 135,406,819.95
5. Step 5: Solve for x
   x = 135,406,819.95/12,395.53
6. Step 6: Final answer
   x = 10,923.84