Finding the Fourth Proportional to 12,361.42, 17,061.94 and 7,642.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,361.42 : 17,061.94 = 7,642.94 : x
2. Step 2: Convert to fraction form
   12,361.42/17,061.94 = 7,642.94/x
3. Step 3: Cross multiply
   12,361.42x = 17,061.94 × 7,642.94
4. Step 4: Simplify right side
   12,361.42x = 130,403,383.70
5. Step 5: Solve for x
   x = 130,403,383.70/12,361.42
6. Step 6: Final answer
   x = 10,549.22