Finding the Fourth Proportional to 42,969.72, 64,398.18 and 31,163.16

Step by Step Solution

1. Step 1: Write the proportion equation
   42,969.72 : 64,398.18 = 31,163.16 : x
2. Step 2: Convert to fraction form
   42,969.72/64,398.18 = 31,163.16/x
3. Step 3: Cross multiply
   42,969.72x = 64,398.18 × 31,163.16
4. Step 4: Simplify right side
   42,969.72x = 2,006,850,787.05
5. Step 5: Solve for x
   x = 2,006,850,787.05/42,969.72
6. Step 6: Final answer
   x = 46,703.84