Finding the Fourth Proportional to 9,210.17, 12,711.56 and 5,434.27

Step by Step Solution

1. Step 1: Write the proportion equation
   9,210.17 : 12,711.56 = 5,434.27 : x
2. Step 2: Convert to fraction form
   9,210.17/12,711.56 = 5,434.27/x
3. Step 3: Cross multiply
   9,210.17x = 12,711.56 × 5,434.27
4. Step 4: Simplify right side
   9,210.17x = 69,077,990.21
5. Step 5: Solve for x
   x = 69,077,990.21/9,210.17
6. Step 6: Final answer
   x = 7,500.18