Finding the Fourth Proportional to 12,918.56, 17,824.32 and 7,882.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,918.56 : 17,824.32 = 7,882.45 : x
2. Step 2: Convert to fraction form
   12,918.56/17,824.32 = 7,882.45/x
3. Step 3: Cross multiply
   12,918.56x = 17,824.32 × 7,882.45
4. Step 4: Simplify right side
   12,918.56x = 140,499,266.62
5. Step 5: Solve for x
   x = 140,499,266.62/12,918.56
6. Step 6: Final answer
   x = 10,875.77