Finding the Fourth Proportional to 9,076.76, 12,529.15 and 5,491.90

Step by Step Solution

1. Step 1: Write the proportion equation
   9,076.76 : 12,529.15 = 5,491.90 : x
2. Step 2: Convert to fraction form
   9,076.76/12,529.15 = 5,491.90/x
3. Step 3: Cross multiply
   9,076.76x = 12,529.15 × 5,491.90
4. Step 4: Simplify right side
   9,076.76x = 68,808,840.82
5. Step 5: Solve for x
   x = 68,808,840.82/9,076.76
6. Step 6: Final answer
   x = 7,580.77