Finding the Fourth Proportional to 42,939.09, 64,448.28 and 30,943.71

Step by Step Solution

1. Step 1: Write the proportion equation
   42,939.09 : 64,448.28 = 30,943.71 : x
2. Step 2: Convert to fraction form
   42,939.09/64,448.28 = 30,943.71/x
3. Step 3: Cross multiply
   42,939.09x = 64,448.28 × 30,943.71
4. Step 4: Simplify right side
   42,939.09x = 1,994,268,886.32
5. Step 5: Solve for x
   x = 1,994,268,886.32/42,939.09
6. Step 6: Final answer
   x = 46,444.13