Finding the Fourth Proportional to 2,978.82, 4,462.86 and 2,803.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.82 : 4,462.86 = 2,803.16 : x
2. Step 2: Convert to fraction form
   2,978.82/4,462.86 = 2,803.16/x
3. Step 3: Cross multiply
   2,978.82x = 4,462.86 × 2,803.16
4. Step 4: Simplify right side
   2,978.82x = 12,510,110.64
5. Step 5: Solve for x
   x = 12,510,110.64/2,978.82
6. Step 6: Final answer
   x = 4,199.69