Finding the Fourth Proportional to 1,730.12, 2,387.76 and 1,031.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,730.12 : 2,387.76 = 1,031.72 : x
2. Step 2: Convert to fraction form
   1,730.12/2,387.76 = 1,031.72/x
3. Step 3: Cross multiply
   1,730.12x = 2,387.76 × 1,031.72
4. Step 4: Simplify right side
   1,730.12x = 2,463,499.75
5. Step 5: Solve for x
   x = 2,463,499.75/1,730.12
6. Step 6: Final answer
   x = 1,423.89