Finding the Fourth Proportional to 7,119.91, 10,686.37 and 3,612.34

Step by Step Solution

1. Step 1: Write the proportion equation
   7,119.91 : 10,686.37 = 3,612.34 : x
2. Step 2: Convert to fraction form
   7,119.91/10,686.37 = 3,612.34/x
3. Step 3: Cross multiply
   7,119.91x = 10,686.37 × 3,612.34
4. Step 4: Simplify right side
   7,119.91x = 38,602,801.81
5. Step 5: Solve for x
   x = 38,602,801.81/7,119.91
6. Step 6: Final answer
   x = 5,421.81