Finding the Fourth Proportional to 3,904.63, 5,857.81 and 1,131.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,904.63 : 5,857.81 = 1,131.50 : x
2. Step 2: Convert to fraction form
   3,904.63/5,857.81 = 1,131.50/x
3. Step 3: Cross multiply
   3,904.63x = 5,857.81 × 1,131.50
4. Step 4: Simplify right side
   3,904.63x = 6,628,123.83
5. Step 5: Solve for x
   x = 6,628,123.83/3,904.63
6. Step 6: Final answer
   x = 1,697.50