Finding the Fourth Proportional to 28,036.27, 42,054.50 and 8,315.00

Step by Step Solution

1. Step 1: Write the proportion equation
   28,036.27 : 42,054.50 = 8,315.00 : x
2. Step 2: Convert to fraction form
   28,036.27/42,054.50 = 8,315.00/x
3. Step 3: Cross multiply
   28,036.27x = 42,054.50 × 8,315.00
4. Step 4: Simplify right side
   28,036.27x = 349,682,978.01
5. Step 5: Solve for x
   x = 349,682,978.01/28,036.27
6. Step 6: Final answer
   x = 12,472.52