Finding the Fourth Proportional to 13,315.56, 18,374.85 and 7,646.32

Step by Step Solution

1. Step 1: Write the proportion equation
   13,315.56 : 18,374.85 = 7,646.32 : x
2. Step 2: Convert to fraction form
   13,315.56/18,374.85 = 7,646.32/x
3. Step 3: Cross multiply
   13,315.56x = 18,374.85 × 7,646.32
4. Step 4: Simplify right side
   13,315.56x = 140,499,954.30
5. Step 5: Solve for x
   x = 140,499,954.30/13,315.56
6. Step 6: Final answer
   x = 10,551.56