Finding the Fourth Proportional to 13,113.55, 18,096.78 and 7,808.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,113.55 : 18,096.78 = 7,808.59 : x
2. Step 2: Convert to fraction form
   13,113.55/18,096.78 = 7,808.59/x
3. Step 3: Cross multiply
   13,113.55x = 18,096.78 × 7,808.59
4. Step 4: Simplify right side
   13,113.55x = 141,310,335.34
5. Step 5: Solve for x
   x = 141,310,335.34/13,113.55
6. Step 6: Final answer
   x = 10,775.90