Finding the Fourth Proportional to 5,819.51, 7,978.56 and 5,714.21

Step by Step Solution

1. Step 1: Write the proportion equation
   5,819.51 : 7,978.56 = 5,714.21 : x
2. Step 2: Convert to fraction form
   5,819.51/7,978.56 = 5,714.21/x
3. Step 3: Cross multiply
   5,819.51x = 7,978.56 × 5,714.21
4. Step 4: Simplify right side
   5,819.51x = 45,591,167.34
5. Step 5: Solve for x
   x = 45,591,167.34/5,819.51
6. Step 6: Final answer
   x = 7,834.19