Finding the Fourth Proportional to 1,436.80, 1,982.88 and 914.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.80 : 1,982.88 = 914.08 : x
2. Step 2: Convert to fraction form
   1,436.80/1,982.88 = 914.08/x
3. Step 3: Cross multiply
   1,436.80x = 1,982.88 × 914.08
4. Step 4: Simplify right side
   1,436.80x = 1,812,510.95
5. Step 5: Solve for x
   x = 1,812,510.95/1,436.80
6. Step 6: Final answer
   x = 1,261.49