Finding the Fourth Proportional to 1,436.74, 2,156.55 and 1,115.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.74 : 2,156.55 = 1,115.62 : x
2. Step 2: Convert to fraction form
   1,436.74/2,156.55 = 1,115.62/x
3. Step 3: Cross multiply
   1,436.74x = 2,156.55 × 1,115.62
4. Step 4: Simplify right side
   1,436.74x = 2,405,890.31
5. Step 5: Solve for x
   x = 2,405,890.31/1,436.74
6. Step 6: Final answer
   x = 1,674.55