Finding the Fourth Proportional to 8,410.33, 12,659.35 and 7,141.87

Step by Step Solution

1. Step 1: Write the proportion equation
   8,410.33 : 12,659.35 = 7,141.87 : x
2. Step 2: Convert to fraction form
   8,410.33/12,659.35 = 7,141.87/x
3. Step 3: Cross multiply
   8,410.33x = 12,659.35 × 7,141.87
4. Step 4: Simplify right side
   8,410.33x = 90,411,431.98
5. Step 5: Solve for x
   x = 90,411,431.98/8,410.33
6. Step 6: Final answer
   x = 10,750.05