Finding the Fourth Proportional to 9,027.06, 12,458.43 and 5,490.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,027.06 : 12,458.43 = 5,490.78 : x
2. Step 2: Convert to fraction form
   9,027.06/12,458.43 = 5,490.78/x
3. Step 3: Cross multiply
   9,027.06x = 12,458.43 × 5,490.78
4. Step 4: Simplify right side
   9,027.06x = 68,406,498.28
5. Step 5: Solve for x
   x = 68,406,498.28/9,027.06
6. Step 6: Final answer
   x = 7,577.94