Finding the Fourth Proportional to 31,012.53, 42,796.89 and 16,865.07

Step by Step Solution

1. Step 1: Write the proportion equation
   31,012.53 : 42,796.89 = 16,865.07 : x
2. Step 2: Convert to fraction form
   31,012.53/42,796.89 = 16,865.07/x
3. Step 3: Cross multiply
   31,012.53x = 42,796.89 × 16,865.07
4. Step 4: Simplify right side
   31,012.53x = 721,772,545.63
5. Step 5: Solve for x
   x = 721,772,545.63/31,012.53
6. Step 6: Final answer
   x = 23,273.58