Finding the Fourth Proportional to 2,870.32, 4,305.16 and 790.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.32 : 4,305.16 = 790.48 : x
2. Step 2: Convert to fraction form
   2,870.32/4,305.16 = 790.48/x
3. Step 3: Cross multiply
   2,870.32x = 4,305.16 × 790.48
4. Step 4: Simplify right side
   2,870.32x = 3,403,142.88
5. Step 5: Solve for x
   x = 3,403,142.88/2,870.32
6. Step 6: Final answer
   x = 1,185.63