Finding the Fourth Proportional to 13,150.66, 19,723.80 and 3,914.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,150.66 : 19,723.80 = 3,914.50 : x
2. Step 2: Convert to fraction form
   13,150.66/19,723.80 = 3,914.50/x
3. Step 3: Cross multiply
   13,150.66x = 19,723.80 × 3,914.50
4. Step 4: Simplify right side
   13,150.66x = 77,208,815.10
5. Step 5: Solve for x
   x = 77,208,815.10/13,150.66
6. Step 6: Final answer
   x = 5,871.10