Finding the Fourth Proportional to 7,112.42, 10,669.20 and 1,918.22

Step by Step Solution

1. Step 1: Write the proportion equation
   7,112.42 : 10,669.20 = 1,918.22 : x
2. Step 2: Convert to fraction form
   7,112.42/10,669.20 = 1,918.22/x
3. Step 3: Cross multiply
   7,112.42x = 10,669.20 × 1,918.22
4. Step 4: Simplify right side
   7,112.42x = 20,465,872.82
5. Step 5: Solve for x
   x = 20,465,872.82/7,112.42
6. Step 6: Final answer
   x = 2,877.48