Finding the Fourth Proportional to 4,978.32, 7,469.40 and 1,691.40

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.32 : 7,469.40 = 1,691.40 : x
2. Step 2: Convert to fraction form
   4,978.32/7,469.40 = 1,691.40/x
3. Step 3: Cross multiply
   4,978.32x = 7,469.40 × 1,691.40
4. Step 4: Simplify right side
   4,978.32x = 12,633,743.16
5. Step 5: Solve for x
   x = 12,633,743.16/4,978.32
6. Step 6: Final answer
   x = 2,537.75