Finding the Fourth Proportional to 28,336, 42,503.98 and 13,499.96

Step by Step Solution

1. Step 1: Write the proportion equation
   28,336 : 42,503.98 = 13,499.96 : x
2. Step 2: Convert to fraction form
   28,336/42,503.98 = 13,499.96/x
3. Step 3: Cross multiply
   28,336x = 42,503.98 × 13,499.96
4. Step 4: Simplify right side
   28,336x = 573,802,029.84
5. Step 5: Solve for x
   x = 573,802,029.84/28,336
6. Step 6: Final answer
   x = 20,249.93