Finding the Fourth Proportional to 13,693.34, 18,896.72 and 7,405.58

Step by Step Solution

1. Step 1: Write the proportion equation
   13,693.34 : 18,896.72 = 7,405.58 : x
2. Step 2: Convert to fraction form
   13,693.34/18,896.72 = 7,405.58/x
3. Step 3: Cross multiply
   13,693.34x = 18,896.72 × 7,405.58
4. Step 4: Simplify right side
   13,693.34x = 139,941,171.70
5. Step 5: Solve for x
   x = 139,941,171.70/13,693.34
6. Step 6: Final answer
   x = 10,219.65