Finding the Fourth Proportional to 2,981.61, 4,472.46 and 790.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,981.61 : 4,472.46 = 790.65 : x
2. Step 2: Convert to fraction form
   2,981.61/4,472.46 = 790.65/x
3. Step 3: Cross multiply
   2,981.61x = 4,472.46 × 790.65
4. Step 4: Simplify right side
   2,981.61x = 3,536,150.50
5. Step 5: Solve for x
   x = 3,536,150.50/2,981.61
6. Step 6: Final answer
   x = 1,185.99