Finding the Fourth Proportional to 3,978.16, 5,968.20 and 2,810.45

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.16 : 5,968.20 = 2,810.45 : x
2. Step 2: Convert to fraction form
   3,978.16/5,968.20 = 2,810.45/x
3. Step 3: Cross multiply
   3,978.16x = 5,968.20 × 2,810.45
4. Step 4: Simplify right side
   3,978.16x = 16,773,303.77
5. Step 5: Solve for x
   x = 16,773,303.77/3,978.16
6. Step 6: Final answer
   x = 4,216.34