Finding the Fourth Proportional to 1,436.72, 1,983.40 and 913.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.72 : 1,983.40 = 913.52 : x
2. Step 2: Convert to fraction form
   1,436.72/1,983.40 = 913.52/x
3. Step 3: Cross multiply
   1,436.72x = 1,983.40 × 913.52
4. Step 4: Simplify right side
   1,436.72x = 1,811,875.57
5. Step 5: Solve for x
   x = 1,811,875.57/1,436.72
6. Step 6: Final answer
   x = 1,261.12