Finding the Fourth Proportional to 7,111.31, 9,814.10 and 3,967.52

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.31 : 9,814.10 = 3,967.52 : x
2. Step 2: Convert to fraction form
   7,111.31/9,814.10 = 3,967.52/x
3. Step 3: Cross multiply
   7,111.31x = 9,814.10 × 3,967.52
4. Step 4: Simplify right side
   7,111.31x = 38,937,569.12
5. Step 5: Solve for x
   x = 38,937,569.12/7,111.31
6. Step 6: Final answer
   x = 5,475.45