Finding the Fourth Proportional to 31,036.43, 42,806.75 and 21,492.27

Step by Step Solution

1. Step 1: Write the proportion equation
   31,036.43 : 42,806.75 = 21,492.27 : x
2. Step 2: Convert to fraction form
   31,036.43/42,806.75 = 21,492.27/x
3. Step 3: Cross multiply
   31,036.43x = 42,806.75 × 21,492.27
4. Step 4: Simplify right side
   31,036.43x = 920,014,121.36
5. Step 5: Solve for x
   x = 920,014,121.36/31,036.43
6. Step 6: Final answer
   x = 29,643.04