Finding the Fourth Proportional to 2,981.35, 4,471.72 and 790.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,981.35 : 4,471.72 = 790.30 : x
2. Step 2: Convert to fraction form
   2,981.35/4,471.72 = 790.30/x
3. Step 3: Cross multiply
   2,981.35x = 4,471.72 × 790.30
4. Step 4: Simplify right side
   2,981.35x = 3,533,987.16
5. Step 5: Solve for x
   x = 3,533,987.16/2,981.35
6. Step 6: Final answer
   x = 1,185.37