Finding the Fourth Proportional to 28,548.30, 42,818.67 and 12,962.34

Step by Step Solution

1. Step 1: Write the proportion equation
   28,548.30 : 42,818.67 = 12,962.34 : x
2. Step 2: Convert to fraction form
   28,548.30/42,818.67 = 12,962.34/x
3. Step 3: Cross multiply
   28,548.30x = 42,818.67 × 12,962.34
4. Step 4: Simplify right side
   28,548.30x = 555,030,158.89
5. Step 5: Solve for x
   x = 555,030,158.89/28,548.30
6. Step 6: Final answer
   x = 19,441.79