Finding the Fourth Proportional to 9,027.86, 12,459.80 and 5,490.38

Step by Step Solution

1. Step 1: Write the proportion equation
   9,027.86 : 12,459.80 = 5,490.38 : x
2. Step 2: Convert to fraction form
   9,027.86/12,459.80 = 5,490.38/x
3. Step 3: Cross multiply
   9,027.86x = 12,459.80 × 5,490.38
4. Step 4: Simplify right side
   9,027.86x = 68,409,081.60
5. Step 5: Solve for x
   x = 68,409,081.60/9,027.86
6. Step 6: Final answer
   x = 7,577.56