Finding the Fourth Proportional to 7,862.05, 10,842.20 and 5,168.51

Step by Step Solution

1. Step 1: Write the proportion equation
   7,862.05 : 10,842.20 = 5,168.51 : x
2. Step 2: Convert to fraction form
   7,862.05/10,842.20 = 5,168.51/x
3. Step 3: Cross multiply
   7,862.05x = 10,842.20 × 5,168.51
4. Step 4: Simplify right side
   7,862.05x = 56,038,019.12
5. Step 5: Solve for x
   x = 56,038,019.12/7,862.05
6. Step 6: Final answer
   x = 7,127.66