Finding the Fourth Proportional to 19,081.53, 28,616.83 and 6,429.91

Step by Step Solution

1. Step 1: Write the proportion equation
   19,081.53 : 28,616.83 = 6,429.91 : x
2. Step 2: Convert to fraction form
   19,081.53/28,616.83 = 6,429.91/x
3. Step 3: Cross multiply
   19,081.53x = 28,616.83 × 6,429.91
4. Step 4: Simplify right side
   19,081.53x = 184,003,577.88
5. Step 5: Solve for x
   x = 184,003,577.88/19,081.53
6. Step 6: Final answer
   x = 9,643.02