Finding the Fourth Proportional to 9,099.59, 12,557.35 and 5,271.77

Step by Step Solution

1. Step 1: Write the proportion equation
   9,099.59 : 12,557.35 = 5,271.77 : x
2. Step 2: Convert to fraction form
   9,099.59/12,557.35 = 5,271.77/x
3. Step 3: Cross multiply
   9,099.59x = 12,557.35 × 5,271.77
4. Step 4: Simplify right side
   9,099.59x = 66,199,398.70
5. Step 5: Solve for x
   x = 66,199,398.70/9,099.59
6. Step 6: Final answer
   x = 7,274.99