Finding the Fourth Proportional to 28,606.25, 42,918.34 and 12,824.52

Step by Step Solution

1. Step 1: Write the proportion equation
   28,606.25 : 42,918.34 = 12,824.52 : x
2. Step 2: Convert to fraction form
   28,606.25/42,918.34 = 12,824.52/x
3. Step 3: Cross multiply
   28,606.25x = 42,918.34 × 12,824.52
4. Step 4: Simplify right side
   28,606.25x = 550,407,109.70
5. Step 5: Solve for x
   x = 550,407,109.70/28,606.25
6. Step 6: Final answer
   x = 19,240.80