Finding the Fourth Proportional to 12,942.18, 17,860.50 and 7,635.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,942.18 : 17,860.50 = 7,635.06 : x
2. Step 2: Convert to fraction form
   12,942.18/17,860.50 = 7,635.06/x
3. Step 3: Cross multiply
   12,942.18x = 17,860.50 × 7,635.06
4. Step 4: Simplify right side
   12,942.18x = 136,365,989.13
5. Step 5: Solve for x
   x = 136,365,989.13/12,942.18
6. Step 6: Final answer
   x = 10,536.55