Finding the Fourth Proportional to 9,210.61, 12,710.72 and 5,433.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,210.61 : 12,710.72 = 5,433.78 : x
2. Step 2: Convert to fraction form
   9,210.61/12,710.72 = 5,433.78/x
3. Step 3: Cross multiply
   9,210.61x = 12,710.72 × 5,433.78
4. Step 4: Simplify right side
   9,210.61x = 69,067,317.37
5. Step 5: Solve for x
   x = 69,067,317.37/9,210.61
6. Step 6: Final answer
   x = 7,498.67