Finding the Fourth Proportional to 1,436.96, 2,155.59 and 512.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.96 : 2,155.59 = 512.62 : x
2. Step 2: Convert to fraction form
   1,436.96/2,155.59 = 512.62/x
3. Step 3: Cross multiply
   1,436.96x = 2,155.59 × 512.62
4. Step 4: Simplify right side
   1,436.96x = 1,104,998.55
5. Step 5: Solve for x
   x = 1,104,998.55/1,436.96
6. Step 6: Final answer
   x = 768.98