Finding the Fourth Proportional to 9,118, 12,583.76 and 5,580.53

Step by Step Solution

1. Step 1: Write the proportion equation
   9,118 : 12,583.76 = 5,580.53 : x
2. Step 2: Convert to fraction form
   9,118/12,583.76 = 5,580.53/x
3. Step 3: Cross multiply
   9,118x = 12,583.76 × 5,580.53
4. Step 4: Simplify right side
   9,118x = 70,224,050.19
5. Step 5: Solve for x
   x = 70,224,050.19/9,118
6. Step 6: Final answer
   x = 7,701.69