Finding the Fourth Proportional to 978.75, 1,470.17 and 746.83

Step by Step Solution

1. Step 1: Write the proportion equation
   978.75 : 1,470.17 = 746.83 : x
2. Step 2: Convert to fraction form
   978.75/1,470.17 = 746.83/x
3. Step 3: Cross multiply
   978.75x = 1,470.17 × 746.83
4. Step 4: Simplify right side
   978.75x = 1,097,970.77
5. Step 5: Solve for x
   x = 1,097,970.77/978.75
6. Step 6: Final answer
   x = 1,121.81