Finding the Fourth Proportional to 12,698.66, 19,049.98 and 3,931.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,698.66 : 19,049.98 = 3,931.50 : x
2. Step 2: Convert to fraction form
   12,698.66/19,049.98 = 3,931.50/x
3. Step 3: Cross multiply
   12,698.66x = 19,049.98 × 3,931.50
4. Step 4: Simplify right side
   12,698.66x = 74,894,996.37
5. Step 5: Solve for x
   x = 74,894,996.37/12,698.66
6. Step 6: Final answer
   x = 5,897.87