Finding the Fourth Proportional to 28,019.04, 42,034.70 and 8,299.12

Step by Step Solution

1. Step 1: Write the proportion equation
   28,019.04 : 42,034.70 = 8,299.12 : x
2. Step 2: Convert to fraction form
   28,019.04/42,034.70 = 8,299.12/x
3. Step 3: Cross multiply
   28,019.04x = 42,034.70 × 8,299.12
4. Step 4: Simplify right side
   28,019.04x = 348,851,019.46
5. Step 5: Solve for x
   x = 348,851,019.46/28,019.04
6. Step 6: Final answer
   x = 12,450.50