Finding the Fourth Proportional to 42,857.34, 64,229.31 and 31,050.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42,857.34 : 64,229.31 = 31,050.78 : x
2. Step 2: Convert to fraction form
   42,857.34/64,229.31 = 31,050.78/x
3. Step 3: Cross multiply
   42,857.34x = 64,229.31 × 31,050.78
4. Step 4: Simplify right side
   42,857.34x = 1,994,370,174.36
5. Step 5: Solve for x
   x = 1,994,370,174.36/42,857.34
6. Step 6: Final answer
   x = 46,535.09