Finding the Fourth Proportional to 4,978.07, 7,462.46 and 1,688.86

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.07 : 7,462.46 = 1,688.86 : x
2. Step 2: Convert to fraction form
   4,978.07/7,462.46 = 1,688.86/x
3. Step 3: Cross multiply
   4,978.07x = 7,462.46 × 1,688.86
4. Step 4: Simplify right side
   4,978.07x = 12,603,050.20
5. Step 5: Solve for x
   x = 12,603,050.20/4,978.07
6. Step 6: Final answer
   x = 2,531.71