Finding the Fourth Proportional to 9,210.81, 12,710.36 and 5,434.14

Step by Step Solution

1. Step 1: Write the proportion equation
   9,210.81 : 12,710.36 = 5,434.14 : x
2. Step 2: Convert to fraction form
   9,210.81/12,710.36 = 5,434.14/x
3. Step 3: Cross multiply
   9,210.81x = 12,710.36 × 5,434.14
4. Step 4: Simplify right side
   9,210.81x = 69,069,848.52
5. Step 5: Solve for x
   x = 69,069,848.52/9,210.81
6. Step 6: Final answer
   x = 7,498.78