Finding the Fourth Proportional to 21,345.59, 29,456.20 and 11,785.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,345.59 : 29,456.20 = 11,785.32 : x
2. Step 2: Convert to fraction form
   21,345.59/29,456.20 = 11,785.32/x
3. Step 3: Cross multiply
   21,345.59x = 29,456.20 × 11,785.32
4. Step 4: Simplify right side
   21,345.59x = 347,150,757.72
5. Step 5: Solve for x
   x = 347,150,757.72/21,345.59
6. Step 6: Final answer
   x = 16,263.35