Finding the Fourth Proportional to 13,099.56, 19,618.96 and 7,539.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,099.56 : 19,618.96 = 7,539.12 : x
2. Step 2: Convert to fraction form
   13,099.56/19,618.96 = 7,539.12/x
3. Step 3: Cross multiply
   13,099.56x = 19,618.96 × 7,539.12
4. Step 4: Simplify right side
   13,099.56x = 147,909,693.72
5. Step 5: Solve for x
   x = 147,909,693.72/13,099.56
6. Step 6: Final answer
   x = 11,291.20