Finding the Fourth Proportional to 1,385.96, 1,911.96 and 1,012.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.96 : 1,911.96 = 1,012.32 : x
2. Step 2: Convert to fraction form
   1,385.96/1,911.96 = 1,012.32/x
3. Step 3: Cross multiply
   1,385.96x = 1,911.96 × 1,012.32
4. Step 4: Simplify right side
   1,385.96x = 1,935,515.35
5. Step 5: Solve for x
   x = 1,935,515.35/1,385.96
6. Step 6: Final answer
   x = 1,396.52