Finding the Fourth Proportional to 28,498.84, 42,756.90 and 13,703.56

Step by Step Solution

1. Step 1: Write the proportion equation
   28,498.84 : 42,756.90 = 13,703.56 : x
2. Step 2: Convert to fraction form
   28,498.84/42,756.90 = 13,703.56/x
3. Step 3: Cross multiply
   28,498.84x = 42,756.90 × 13,703.56
4. Step 4: Simplify right side
   28,498.84x = 585,921,744.56
5. Step 5: Solve for x
   x = 585,921,744.56/28,498.84
6. Step 6: Final answer
   x = 20,559.49