Finding the Fourth Proportional to 8,985.83, 13,478.82 and 3,142.46

Step by Step Solution

1. Step 1: Write the proportion equation
   8,985.83 : 13,478.82 = 3,142.46 : x
2. Step 2: Convert to fraction form
   8,985.83/13,478.82 = 3,142.46/x
3. Step 3: Cross multiply
   8,985.83x = 13,478.82 × 3,142.46
4. Step 4: Simplify right side
   8,985.83x = 42,356,585.30
5. Step 5: Solve for x
   x = 42,356,585.30/8,985.83
6. Step 6: Final answer
   x = 4,713.71