Finding the Fourth Proportional to 2,128.32, 3,189.62 and 1,030.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.32 : 3,189.62 = 1,030.50 : x
2. Step 2: Convert to fraction form
   2,128.32/3,189.62 = 1,030.50/x
3. Step 3: Cross multiply
   2,128.32x = 3,189.62 × 1,030.50
4. Step 4: Simplify right side
   2,128.32x = 3,286,903.41
5. Step 5: Solve for x
   x = 3,286,903.41/2,128.32
6. Step 6: Final answer
   x = 1,544.37