Finding the Fourth Proportional to 42,762.21, 64,086.81 and 30,955.47

Step by Step Solution

1. Step 1: Write the proportion equation
   42,762.21 : 64,086.81 = 30,955.47 : x
2. Step 2: Convert to fraction form
   42,762.21/64,086.81 = 30,955.47/x
3. Step 3: Cross multiply
   42,762.21x = 64,086.81 × 30,955.47
4. Step 4: Simplify right side
   42,762.21x = 1,983,837,324.35
5. Step 5: Solve for x
   x = 1,983,837,324.35/42,762.21
6. Step 6: Final answer
   x = 46,392.30