Finding the Fourth Proportional to 4,978.08, 7,467.78 and 1,690.29

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.08 : 7,467.78 = 1,690.29 : x
2. Step 2: Convert to fraction form
   4,978.08/7,467.78 = 1,690.29/x
3. Step 3: Cross multiply
   4,978.08x = 7,467.78 × 1,690.29
4. Step 4: Simplify right side
   4,978.08x = 12,622,713.86
5. Step 5: Solve for x
   x = 12,622,713.86/4,978.08
6. Step 6: Final answer
   x = 2,535.66