Finding the Fourth Proportional to 28,494.84, 42,747.18 and 12,705.48

Step by Step Solution

1. Step 1: Write the proportion equation
   28,494.84 : 42,747.18 = 12,705.48 : x
2. Step 2: Convert to fraction form
   28,494.84/42,747.18 = 12,705.48/x
3. Step 3: Cross multiply
   28,494.84x = 42,747.18 × 12,705.48
4. Step 4: Simplify right side
   28,494.84x = 543,123,440.55
5. Step 5: Solve for x
   x = 543,123,440.55/28,494.84
6. Step 6: Final answer
   x = 19,060.41