Finding the Fourth Proportional to 13,293.32, 18,346.50 and 7,991.06

Step by Step Solution

1. Step 1: Write the proportion equation
   13,293.32 : 18,346.50 = 7,991.06 : x
2. Step 2: Convert to fraction form
   13,293.32/18,346.50 = 7,991.06/x
3. Step 3: Cross multiply
   13,293.32x = 18,346.50 × 7,991.06
4. Step 4: Simplify right side
   13,293.32x = 146,607,890.56
5. Step 5: Solve for x
   x = 146,607,890.56/13,293.32
6. Step 6: Final answer
   x = 11,028.69