Finding the Fourth Proportional to 28,084.62, 42,124.77 and 13,271.34

Step by Step Solution

1. Step 1: Write the proportion equation
   28,084.62 : 42,124.77 = 13,271.34 : x
2. Step 2: Convert to fraction form
   28,084.62/42,124.77 = 13,271.34/x
3. Step 3: Cross multiply
   28,084.62x = 42,124.77 × 13,271.34
4. Step 4: Simplify right side
   28,084.62x = 559,052,145.09
5. Step 5: Solve for x
   x = 559,052,145.09/28,084.62
6. Step 6: Final answer
   x = 19,905.99