Finding the Fourth Proportional to 2,428.56, 3,643.20 and 947.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,428.56 : 3,643.20 = 947.52 : x
2. Step 2: Convert to fraction form
   2,428.56/3,643.20 = 947.52/x
3. Step 3: Cross multiply
   2,428.56x = 3,643.20 × 947.52
4. Step 4: Simplify right side
   2,428.56x = 3,452,004.86
5. Step 5: Solve for x
   x = 3,452,004.86/2,428.56
6. Step 6: Final answer
   x = 1,421.42