Finding the Fourth Proportional to 12,619.77, 18,928.98 and 3,854.00

Step by Step Solution

1. Step 1: Write the proportion equation
   12,619.77 : 18,928.98 = 3,854.00 : x
2. Step 2: Convert to fraction form
   12,619.77/18,928.98 = 3,854.00/x
3. Step 3: Cross multiply
   12,619.77x = 18,928.98 × 3,854.00
4. Step 4: Simplify right side
   12,619.77x = 72,952,321.79
5. Step 5: Solve for x
   x = 72,952,321.79/12,619.77
6. Step 6: Final answer
   x = 5,780.79