Finding the Fourth Proportional to 7,870.85, 10,861.71 and 4,513.67

Step by Step Solution

1. Step 1: Write the proportion equation
   7,870.85 : 10,861.71 = 4,513.67 : x
2. Step 2: Convert to fraction form
   7,870.85/10,861.71 = 4,513.67/x
3. Step 3: Cross multiply
   7,870.85x = 10,861.71 × 4,513.67
4. Step 4: Simplify right side
   7,870.85x = 49,026,174.58
5. Step 5: Solve for x
   x = 49,026,174.58/7,870.85
6. Step 6: Final answer
   x = 6,228.83