Finding the Fourth Proportional to 52,800.14, 79,200.47 and 13,357.28

Step by Step Solution

1. Step 1: Write the proportion equation
   52,800.14 : 79,200.47 = 13,357.28 : x
2. Step 2: Convert to fraction form
   52,800.14/79,200.47 = 13,357.28/x
3. Step 3: Cross multiply
   52,800.14x = 79,200.47 × 13,357.28
4. Step 4: Simplify right side
   52,800.14x = 1,057,903,085.32
5. Step 5: Solve for x
   x = 1,057,903,085.32/52,800.14
6. Step 6: Final answer
   x = 20,035.99