Finding the Fourth Proportional to 7,885.83, 10,869.87 and 7,730.31

Step by Step Solution

1. Step 1: Write the proportion equation
   7,885.83 : 10,869.87 = 7,730.31 : x
2. Step 2: Convert to fraction form
   7,885.83/10,869.87 = 7,730.31/x
3. Step 3: Cross multiply
   7,885.83x = 10,869.87 × 7,730.31
4. Step 4: Simplify right side
   7,885.83x = 84,027,464.76
5. Step 5: Solve for x
   x = 84,027,464.76/7,885.83
6. Step 6: Final answer
   x = 10,655.50