Finding the Fourth Proportional to 28,573.76, 42,888.34 and 13,793.08

Step by Step Solution

1. Step 1: Write the proportion equation
   28,573.76 : 42,888.34 = 13,793.08 : x
2. Step 2: Convert to fraction form
   28,573.76/42,888.34 = 13,793.08/x
3. Step 3: Cross multiply
   28,573.76x = 42,888.34 × 13,793.08
4. Step 4: Simplify right side
   28,573.76x = 591,562,304.69
5. Step 5: Solve for x
   x = 591,562,304.69/28,573.76
6. Step 6: Final answer
   x = 20,702.99