Finding the Fourth Proportional to 31,012.03, 42,796.20 and 16,864.57

Step by Step Solution

1. Step 1: Write the proportion equation
   31,012.03 : 42,796.20 = 16,864.57 : x
2. Step 2: Convert to fraction form
   31,012.03/42,796.20 = 16,864.57/x
3. Step 3: Cross multiply
   31,012.03x = 42,796.20 × 16,864.57
4. Step 4: Simplify right side
   31,012.03x = 721,739,510.63
5. Step 5: Solve for x
   x = 721,739,510.63/31,012.03
6. Step 6: Final answer
   x = 23,272.89