Finding the Fourth Proportional to 28,066.75, 42,118.05 and 13,276.54

Step by Step Solution

1. Step 1: Write the proportion equation
   28,066.75 : 42,118.05 = 13,276.54 : x
2. Step 2: Convert to fraction form
   28,066.75/42,118.05 = 13,276.54/x
3. Step 3: Cross multiply
   28,066.75x = 42,118.05 × 13,276.54
4. Step 4: Simplify right side
   28,066.75x = 559,181,975.55
5. Step 5: Solve for x
   x = 559,181,975.55/28,066.75
6. Step 6: Final answer
   x = 19,923.29