Finding the Fourth Proportional to 1,054.79, 1,580.37 and 746.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,054.79 : 1,580.37 = 746.12 : x
2. Step 2: Convert to fraction form
   1,054.79/1,580.37 = 746.12/x
3. Step 3: Cross multiply
   1,054.79x = 1,580.37 × 746.12
4. Step 4: Simplify right side
   1,054.79x = 1,179,141.93
5. Step 5: Solve for x
   x = 1,179,141.93/1,054.79
6. Step 6: Final answer
   x = 1,117.90