Finding the Fourth Proportional to 9,356.75, 12,913.97 and 5,580.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,356.75 : 12,913.97 = 5,580.15 : x
2. Step 2: Convert to fraction form
   9,356.75/12,913.97 = 5,580.15/x
3. Step 3: Cross multiply
   9,356.75x = 12,913.97 × 5,580.15
4. Step 4: Simplify right side
   9,356.75x = 72,061,861.79
5. Step 5: Solve for x
   x = 72,061,861.79/9,356.75
6. Step 6: Final answer
   x = 7,701.60