Finding the Fourth Proportional to 13,705.50, 18,913.59 and 7,417.92

Step by Step Solution

1. Step 1: Write the proportion equation
   13,705.50 : 18,913.59 = 7,417.92 : x
2. Step 2: Convert to fraction form
   13,705.50/18,913.59 = 7,417.92/x
3. Step 3: Cross multiply
   13,705.50x = 18,913.59 × 7,417.92
4. Step 4: Simplify right side
   13,705.50x = 140,299,497.53
5. Step 5: Solve for x
   x = 140,299,497.53/13,705.50
6. Step 6: Final answer
   x = 10,236.73