Finding the Fourth Proportional to 13,910.64, 19,196.39 and 9,938.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,910.64 : 19,196.39 = 9,938.50 : x
2. Step 2: Convert to fraction form
   13,910.64/19,196.39 = 9,938.50/x
3. Step 3: Cross multiply
   13,910.64x = 19,196.39 × 9,938.50
4. Step 4: Simplify right side
   13,910.64x = 190,783,298.87
5. Step 5: Solve for x
   x = 190,783,298.87/13,910.64
6. Step 6: Final answer
   x = 13,714.92