Finding the Fourth Proportional to 42,008.65, 63,019.20 and 13,536.06

Step by Step Solution

1. Step 1: Write the proportion equation
   42,008.65 : 63,019.20 = 13,536.06 : x
2. Step 2: Convert to fraction form
   42,008.65/63,019.20 = 13,536.06/x
3. Step 3: Cross multiply
   42,008.65x = 63,019.20 × 13,536.06
4. Step 4: Simplify right side
   42,008.65x = 853,031,621.59
5. Step 5: Solve for x
   x = 853,031,621.59/42,008.65
6. Step 6: Final answer
   x = 20,306.10