Finding the Fourth Proportional to 28,503.50, 42,764.48 and 13,710.50

Step by Step Solution

1. Step 1: Write the proportion equation
   28,503.50 : 42,764.48 = 13,710.50 : x
2. Step 2: Convert to fraction form
   28,503.50/42,764.48 = 13,710.50/x
3. Step 3: Cross multiply
   28,503.50x = 42,764.48 × 13,710.50
4. Step 4: Simplify right side
   28,503.50x = 586,322,223.49
5. Step 5: Solve for x
   x = 586,322,223.49/28,503.50
6. Step 6: Final answer
   x = 20,570.18