Finding the Fourth Proportional to 28,554.66, 42,846.12 and 13,776.12

Step by Step Solution

1. Step 1: Write the proportion equation
   28,554.66 : 42,846.12 = 13,776.12 : x
2. Step 2: Convert to fraction form
   28,554.66/42,846.12 = 13,776.12/x
3. Step 3: Cross multiply
   28,554.66x = 42,846.12 × 13,776.12
4. Step 4: Simplify right side
   28,554.66x = 590,253,290.65
5. Step 5: Solve for x
   x = 590,253,290.65/28,554.66
6. Step 6: Final answer
   x = 20,671.00