Finding the Fourth Proportional to 20,535.86, 28,290.34 and 19,535.31

Step by Step Solution

1. Step 1: Write the proportion equation
   20,535.86 : 28,290.34 = 19,535.31 : x
2. Step 2: Convert to fraction form
   20,535.86/28,290.34 = 19,535.31/x
3. Step 3: Cross multiply
   20,535.86x = 28,290.34 × 19,535.31
4. Step 4: Simplify right side
   20,535.86x = 552,660,561.91
5. Step 5: Solve for x
   x = 552,660,561.91/20,535.86
6. Step 6: Final answer
   x = 26,911.98