Finding the Fourth Proportional to 2,978.04, 4,493.73 and 2,858.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.04 : 4,493.73 = 2,858.16 : x
2. Step 2: Convert to fraction form
   2,978.04/4,493.73 = 2,858.16/x
3. Step 3: Cross multiply
   2,978.04x = 4,493.73 × 2,858.16
4. Step 4: Simplify right side
   2,978.04x = 12,843,799.34
5. Step 5: Solve for x
   x = 12,843,799.34/2,978.04
6. Step 6: Final answer
   x = 4,312.84