Finding the Fourth Proportional to 10,513.59, 15,770.45 and 3,118.11

Step by Step Solution

1. Step 1: Write the proportion equation
   10,513.59 : 15,770.45 = 3,118.11 : x
2. Step 2: Convert to fraction form
   10,513.59/15,770.45 = 3,118.11/x
3. Step 3: Cross multiply
   10,513.59x = 15,770.45 × 3,118.11
4. Step 4: Simplify right side
   10,513.59x = 49,173,997.85
5. Step 5: Solve for x
   x = 49,173,997.85/10,513.59
6. Step 6: Final answer
   x = 4,677.18