Finding the Fourth Proportional to 28,490.33, 42,744.71 and 13,700.34

Step by Step Solution

1. Step 1: Write the proportion equation
   28,490.33 : 42,744.71 = 13,700.34 : x
2. Step 2: Convert to fraction form
   28,490.33/42,744.71 = 13,700.34/x
3. Step 3: Cross multiply
   28,490.33x = 42,744.71 × 13,700.34
4. Step 4: Simplify right side
   28,490.33x = 585,617,094.45
5. Step 5: Solve for x
   x = 585,617,094.45/28,490.33
6. Step 6: Final answer
   x = 20,554.94