Finding the Fourth Proportional to 28,179.28, 42,277.83 and 13,400.83

Step by Step Solution

1. Step 1: Write the proportion equation
   28,179.28 : 42,277.83 = 13,400.83 : x
2. Step 2: Convert to fraction form
   28,179.28/42,277.83 = 13,400.83/x
3. Step 3: Cross multiply
   28,179.28x = 42,277.83 × 13,400.83
4. Step 4: Simplify right side
   28,179.28x = 566,558,012.60
5. Step 5: Solve for x
   x = 566,558,012.60/28,179.28
6. Step 6: Final answer
   x = 20,105.48