Finding the Fourth Proportional to 5,157.68, 7,112.22 and 3,061.40

Step by Step Solution

1. Step 1: Write the proportion equation
   5,157.68 : 7,112.22 = 3,061.40 : x
2. Step 2: Convert to fraction form
   5,157.68/7,112.22 = 3,061.40/x
3. Step 3: Cross multiply
   5,157.68x = 7,112.22 × 3,061.40
4. Step 4: Simplify right side
   5,157.68x = 21,773,350.31
5. Step 5: Solve for x
   x = 21,773,350.31/5,157.68
6. Step 6: Final answer
   x = 4,221.54