Finding the Fourth Proportional to 1,397.45, 1,928.59 and 901.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.45 : 1,928.59 = 901.12 : x
2. Step 2: Convert to fraction form
   1,397.45/1,928.59 = 901.12/x
3. Step 3: Cross multiply
   1,397.45x = 1,928.59 × 901.12
4. Step 4: Simplify right side
   1,397.45x = 1,737,891.02
5. Step 5: Solve for x
   x = 1,737,891.02/1,397.45
6. Step 6: Final answer
   x = 1,243.62