Finding the Fourth Proportional to 4,978.02, 7,466.08 and 1,690.78

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.02 : 7,466.08 = 1,690.78 : x
2. Step 2: Convert to fraction form
   4,978.02/7,466.08 = 1,690.78/x
3. Step 3: Cross multiply
   4,978.02x = 7,466.08 × 1,690.78
4. Step 4: Simplify right side
   4,978.02x = 12,623,498.74
5. Step 5: Solve for x
   x = 12,623,498.74/4,978.02
6. Step 6: Final answer
   x = 2,535.85