Finding the Fourth Proportional to 1,055.45, 1,581.89 and 747.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.45 : 1,581.89 = 747.39 : x
2. Step 2: Convert to fraction form
   1,055.45/1,581.89 = 747.39/x
3. Step 3: Cross multiply
   1,055.45x = 1,581.89 × 747.39
4. Step 4: Simplify right side
   1,055.45x = 1,182,288.77
5. Step 5: Solve for x
   x = 1,182,288.77/1,055.45
6. Step 6: Final answer
   x = 1,120.18