Finding the Fourth Proportional to 42,759.81, 64,136.48 and 15,038.37

Step by Step Solution

1. Step 1: Write the proportion equation
   42,759.81 : 64,136.48 = 15,038.37 : x
2. Step 2: Convert to fraction form
   42,759.81/64,136.48 = 15,038.37/x
3. Step 3: Cross multiply
   42,759.81x = 64,136.48 × 15,038.37
4. Step 4: Simplify right side
   42,759.81x = 964,508,041.55
5. Step 5: Solve for x
   x = 964,508,041.55/42,759.81
6. Step 6: Final answer
   x = 22,556.42