Finding the Fourth Proportional to 31,031.42, 42,816.82 and 20,292.04

Step by Step Solution

1. Step 1: Write the proportion equation
   31,031.42 : 42,816.82 = 20,292.04 : x
2. Step 2: Convert to fraction form
   31,031.42/42,816.82 = 20,292.04/x
3. Step 3: Cross multiply
   31,031.42x = 42,816.82 × 20,292.04
4. Step 4: Simplify right side
   31,031.42x = 868,840,424.11
5. Step 5: Solve for x
   x = 868,840,424.11/31,031.42
6. Step 6: Final answer
   x = 27,998.73