Finding the Fourth Proportional to 1,502.61, 2,074.56 and 1,031.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,502.61 : 2,074.56 = 1,031.30 : x
2. Step 2: Convert to fraction form
   1,502.61/2,074.56 = 1,031.30/x
3. Step 3: Cross multiply
   1,502.61x = 2,074.56 × 1,031.30
4. Step 4: Simplify right side
   1,502.61x = 2,139,483.36
5. Step 5: Solve for x
   x = 2,139,483.36/1,502.61
6. Step 6: Final answer
   x = 1,423.84