Finding the Fourth Proportional to 7,870.68, 10,861.77 and 4,285.88

Step by Step Solution

1. Step 1: Write the proportion equation
   7,870.68 : 10,861.77 = 4,285.88 : x
2. Step 2: Convert to fraction form
   7,870.68/10,861.77 = 4,285.88/x
3. Step 3: Cross multiply
   7,870.68x = 10,861.77 × 4,285.88
4. Step 4: Simplify right side
   7,870.68x = 46,552,188.50
5. Step 5: Solve for x
   x = 46,552,188.50/7,870.68
6. Step 6: Final answer
   x = 5,914.63