Finding the Fourth Proportional to 1,397.88, 2,094.12 and 747.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.88 : 2,094.12 = 747.72 : x
2. Step 2: Convert to fraction form
   1,397.88/2,094.12 = 747.72/x
3. Step 3: Cross multiply
   1,397.88x = 2,094.12 × 747.72
4. Step 4: Simplify right side
   1,397.88x = 1,565,815.41
5. Step 5: Solve for x
   x = 1,565,815.41/1,397.88
6. Step 6: Final answer
   x = 1,120.14