Finding the Fourth Proportional to 5,419.42, 7,478.20 and 3,061.57

Step by Step Solution

1. Step 1: Write the proportion equation
   5,419.42 : 7,478.20 = 3,061.57 : x
2. Step 2: Convert to fraction form
   5,419.42/7,478.20 = 3,061.57/x
3. Step 3: Cross multiply
   5,419.42x = 7,478.20 × 3,061.57
4. Step 4: Simplify right side
   5,419.42x = 22,895,032.77
5. Step 5: Solve for x
   x = 22,895,032.77/5,419.42
6. Step 6: Final answer
   x = 4,224.63