Finding the Fourth Proportional to 12,735.54, 19,017.50 and 10,400.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,735.54 : 19,017.50 = 10,400.10 : x
2. Step 2: Convert to fraction form
   12,735.54/19,017.50 = 10,400.10/x
3. Step 3: Cross multiply
   12,735.54x = 19,017.50 × 10,400.10
4. Step 4: Simplify right side
   12,735.54x = 197,783,901.75
5. Step 5: Solve for x
   x = 197,783,901.75/12,735.54
6. Step 6: Final answer
   x = 15,530.08