Finding the Fourth Proportional to 5,419.72, 7,478.88 and 3,061.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,419.72 : 7,478.88 = 3,061.72 : x
2. Step 2: Convert to fraction form
   5,419.72/7,478.88 = 3,061.72/x
3. Step 3: Cross multiply
   5,419.72x = 7,478.88 × 3,061.72
4. Step 4: Simplify right side
   5,419.72x = 22,898,236.47
5. Step 5: Solve for x
   x = 22,898,236.47/5,419.72
6. Step 6: Final answer
   x = 4,224.99