Finding the Fourth Proportional to 1,397.52, 1,923.36 and 1,116.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.52 : 1,923.36 = 1,116.72 : x
2. Step 2: Convert to fraction form
   1,397.52/1,923.36 = 1,116.72/x
3. Step 3: Cross multiply
   1,397.52x = 1,923.36 × 1,116.72
4. Step 4: Simplify right side
   1,397.52x = 2,147,854.58
5. Step 5: Solve for x
   x = 2,147,854.58/1,397.52
6. Step 6: Final answer
   x = 1,536.90