Finding the Fourth Proportional to 12,688.04, 19,033.86 and 3,923.63

Step by Step Solution

1. Step 1: Write the proportion equation
   12,688.04 : 19,033.86 = 3,923.63 : x
2. Step 2: Convert to fraction form
   12,688.04/19,033.86 = 3,923.63/x
3. Step 3: Cross multiply
   12,688.04x = 19,033.86 × 3,923.63
4. Step 4: Simplify right side
   12,688.04x = 74,681,728.94
5. Step 5: Solve for x
   x = 74,681,728.94/12,688.04
6. Step 6: Final answer
   x = 5,886.00