Finding the Fourth Proportional to 42,833.72, 64,223.16 and 20,602.82

Step by Step Solution

1. Step 1: Write the proportion equation
   42,833.72 : 64,223.16 = 20,602.82 : x
2. Step 2: Convert to fraction form
   42,833.72/64,223.16 = 20,602.82/x
3. Step 3: Cross multiply
   42,833.72x = 64,223.16 × 20,602.82
4. Step 4: Simplify right side
   42,833.72x = 1,323,178,205.31
5. Step 5: Solve for x
   x = 1,323,178,205.31/42,833.72
6. Step 6: Final answer
   x = 30,891.04