Finding the Fourth Proportional to 42,855.00, 64,285.74 and 13,275.82

Step by Step Solution

1. Step 1: Write the proportion equation
   42,855.00 : 64,285.74 = 13,275.82 : x
2. Step 2: Convert to fraction form
   42,855.00/64,285.74 = 13,275.82/x
3. Step 3: Cross multiply
   42,855.00x = 64,285.74 × 13,275.82
4. Step 4: Simplify right side
   42,855.00x = 853,445,846.43
5. Step 5: Solve for x
   x = 853,445,846.43/42,855.00
6. Step 6: Final answer
   x = 19,914.73