Finding the Fourth Proportional to 20,575.83, 30,904.76 and 19,415.31

Step by Step Solution

1. Step 1: Write the proportion equation
   20,575.83 : 30,904.76 = 19,415.31 : x
2. Step 2: Convert to fraction form
   20,575.83/30,904.76 = 19,415.31/x
3. Step 3: Cross multiply
   20,575.83x = 30,904.76 × 19,415.31
4. Step 4: Simplify right side
   20,575.83x = 600,025,495.88
5. Step 5: Solve for x
   x = 600,025,495.88/20,575.83
6. Step 6: Final answer
   x = 29,161.67