Finding the Fourth Proportional to 11,859.20, 17,783.68 and 3,646.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,859.20 : 17,783.68 = 3,646.72 : x
2. Step 2: Convert to fraction form
   11,859.20/17,783.68 = 3,646.72/x
3. Step 3: Cross multiply
   11,859.20x = 17,783.68 × 3,646.72
4. Step 4: Simplify right side
   11,859.20x = 64,852,101.53
5. Step 5: Solve for x
   x = 64,852,101.53/11,859.20
6. Step 6: Final answer
   x = 5,468.51