Finding the Fourth Proportional to 2,124.42, 3,188.50 and 1,138.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,124.42 : 3,188.50 = 1,138.02 : x
2. Step 2: Convert to fraction form
   2,124.42/3,188.50 = 1,138.02/x
3. Step 3: Cross multiply
   2,124.42x = 3,188.50 × 1,138.02
4. Step 4: Simplify right side
   2,124.42x = 3,628,576.77
5. Step 5: Solve for x
   x = 3,628,576.77/2,124.42
6. Step 6: Final answer
   x = 1,708.03