Finding the Fourth Proportional to 13,087.22, 18,060.84 and 7,499.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,087.22 : 18,060.84 = 7,499.30 : x
2. Step 2: Convert to fraction form
   13,087.22/18,060.84 = 7,499.30/x
3. Step 3: Cross multiply
   13,087.22x = 18,060.84 × 7,499.30
4. Step 4: Simplify right side
   13,087.22x = 135,443,657.41
5. Step 5: Solve for x
   x = 135,443,657.41/13,087.22
6. Step 6: Final answer
   x = 10,349.31