Finding the Fourth Proportional to 31,061.98, 42,853.08 and 20,303.38

Step by Step Solution

1. Step 1: Write the proportion equation
   31,061.98 : 42,853.08 = 20,303.38 : x
2. Step 2: Convert to fraction form
   31,061.98/42,853.08 = 20,303.38/x
3. Step 3: Cross multiply
   31,061.98x = 42,853.08 × 20,303.38
4. Step 4: Simplify right side
   31,061.98x = 870,062,367.41
5. Step 5: Solve for x
   x = 870,062,367.41/31,061.98
6. Step 6: Final answer
   x = 28,010.53