Finding the Fourth Proportional to 31,010.04, 42,706.44 and 30,912.84

Step by Step Solution

1. Step 1: Write the proportion equation
   31,010.04 : 42,706.44 = 30,912.84 : x
2. Step 2: Convert to fraction form
   31,010.04/42,706.44 = 30,912.84/x
3. Step 3: Cross multiply
   31,010.04x = 42,706.44 × 30,912.84
4. Step 4: Simplify right side
   31,010.04x = 1,320,177,346.69
5. Step 5: Solve for x
   x = 1,320,177,346.69/31,010.04
6. Step 6: Final answer
   x = 42,572.58