Finding the Fourth Proportional to 7,859.42, 10,851.55 and 5,212.34

Step by Step Solution

1. Step 1: Write the proportion equation
   7,859.42 : 10,851.55 = 5,212.34 : x
2. Step 2: Convert to fraction form
   7,859.42/10,851.55 = 5,212.34/x
3. Step 3: Cross multiply
   7,859.42x = 10,851.55 × 5,212.34
4. Step 4: Simplify right side
   7,859.42x = 56,561,900.84
5. Step 5: Solve for x
   x = 56,561,900.84/7,859.42
6. Step 6: Final answer
   x = 7,196.71