Finding the Fourth Proportional to 2,428.72, 3,643.04 and 784.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,428.72 : 3,643.04 = 784.96 : x
2. Step 2: Convert to fraction form
   2,428.72/3,643.04 = 784.96/x
3. Step 3: Cross multiply
   2,428.72x = 3,643.04 × 784.96
4. Step 4: Simplify right side
   2,428.72x = 2,859,633.53
5. Step 5: Solve for x
   x = 2,859,633.53/2,428.72
6. Step 6: Final answer
   x = 1,177.43