Finding the Fourth Proportional to 1,385.18, 1,910.27 and 1,031.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.18 : 1,910.27 = 1,031.97 : x
2. Step 2: Convert to fraction form
   1,385.18/1,910.27 = 1,031.97/x
3. Step 3: Cross multiply
   1,385.18x = 1,910.27 × 1,031.97
4. Step 4: Simplify right side
   1,385.18x = 1,971,336.17
5. Step 5: Solve for x
   x = 1,971,336.17/1,385.18
6. Step 6: Final answer
   x = 1,423.16