Finding the Fourth Proportional to 2,981.66, 4,472.72 and 790.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,981.66 : 4,472.72 = 790.38 : x
2. Step 2: Convert to fraction form
   2,981.66/4,472.72 = 790.38/x
3. Step 3: Cross multiply
   2,981.66x = 4,472.72 × 790.38
4. Step 4: Simplify right side
   2,981.66x = 3,535,148.43
5. Step 5: Solve for x
   x = 3,535,148.43/2,981.66
6. Step 6: Final answer
   x = 1,185.63