Finding the Fourth Proportional to 13,287.77, 18,336.89 and 7,319.99

Step by Step Solution

1. Step 1: Write the proportion equation
   13,287.77 : 18,336.89 = 7,319.99 : x
2. Step 2: Convert to fraction form
   13,287.77/18,336.89 = 7,319.99/x
3. Step 3: Cross multiply
   13,287.77x = 18,336.89 × 7,319.99
4. Step 4: Simplify right side
   13,287.77x = 134,225,723.15
5. Step 5: Solve for x
   x = 134,225,723.15/13,287.77
6. Step 6: Final answer
   x = 10,101.45