Finding the Fourth Proportional to 28,036.02, 42,062.15 and 8,315.06

Step by Step Solution

1. Step 1: Write the proportion equation
   28,036.02 : 42,062.15 = 8,315.06 : x
2. Step 2: Convert to fraction form
   28,036.02/42,062.15 = 8,315.06/x
3. Step 3: Cross multiply
   28,036.02x = 42,062.15 × 8,315.06
4. Step 4: Simplify right side
   28,036.02x = 349,749,049.09
5. Step 5: Solve for x
   x = 349,749,049.09/28,036.02
6. Step 6: Final answer
   x = 12,474.99