Finding the Fourth Proportional to 42,760.20, 64,109.94 and 30,759.48

Step by Step Solution

1. Step 1: Write the proportion equation
   42,760.20 : 64,109.94 = 30,759.48 : x
2. Step 2: Convert to fraction form
   42,760.20/64,109.94 = 30,759.48/x
3. Step 3: Cross multiply
   42,760.20x = 64,109.94 × 30,759.48
4. Step 4: Simplify right side
   42,760.20x = 1,971,988,417.23
5. Step 5: Solve for x
   x = 1,971,988,417.23/42,760.20
6. Step 6: Final answer
   x = 46,117.38