Finding the Fourth Proportional to 2,985.10, 4,478.16 and 1,036.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,985.10 : 4,478.16 = 1,036.78 : x
2. Step 2: Convert to fraction form
   2,985.10/4,478.16 = 1,036.78/x
3. Step 3: Cross multiply
   2,985.10x = 4,478.16 × 1,036.78
4. Step 4: Simplify right side
   2,985.10x = 4,642,866.72
5. Step 5: Solve for x
   x = 4,642,866.72/2,985.10
6. Step 6: Final answer
   x = 1,555.35