Finding the Fourth Proportional to 1,172.18, 1,617.86 and 746.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,172.18 : 1,617.86 = 746.72 : x
2. Step 2: Convert to fraction form
   1,172.18/1,617.86 = 746.72/x
3. Step 3: Cross multiply
   1,172.18x = 1,617.86 × 746.72
4. Step 4: Simplify right side
   1,172.18x = 1,208,080.33
5. Step 5: Solve for x
   x = 1,208,080.33/1,172.18
6. Step 6: Final answer
   x = 1,030.63