Finding the Fourth Proportional to 4,978.59, 7,462.72 and 1,690.57

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.59 : 7,462.72 = 1,690.57 : x
2. Step 2: Convert to fraction form
   4,978.59/7,462.72 = 1,690.57/x
3. Step 3: Cross multiply
   4,978.59x = 7,462.72 × 1,690.57
4. Step 4: Simplify right side
   4,978.59x = 12,616,250.55
5. Step 5: Solve for x
   x = 12,616,250.55/4,978.59
6. Step 6: Final answer
   x = 2,534.10